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14 (fourteen /fɔərˈtiːn/) is the natural number following 13 and preceding 15. In speech, the numbers 14 and 40 are often confused. When carefully enunciated, they differ in which syllable is stressed: 14 /fɔərˈtiːn/ ( listen) vs 40 /ˈfɔrti/. However, in dates such as 1492 or when contrasting numbers in the teens, such as 13, 14, 15, the stress shifts to the first syllable: 14 /ˈfɔərtiːn/.
Fourteen is a composite number, its divisors being 1, 2, 7 and 14.
14 is the 3rd discrete semiprime (2.7) and the 3rd member of the (2.q) discrete semiprime family. The number following 14 —15— is itself a discrete semiprime and this is the first such pair of discrete semiprimes. The next example is the pair commencing 21.
The aliquot sum σ(n) of 14 is 10, also a discrete semiprime and this is again the first example of a discrete semiprime having an aliquot sum in the same form. 14 has an aliquot sequence of 6 members (14,10,8,7,1,0) 14 is the third composite number in the 7-aliquot tree.
Fourteen is itself the Aliquot sum of two numbers; the discrete semiprime 22, and the square number 196.
Fourteen is the base of the tetradecimal notation.
In base fifteen and higher bases (such as hexadecimal), fourteen is represented as E.
Fourteen is the sum of the first three squares, which makes it a square pyramidal number.
This number is the lowest even n for which the equation φ(x) = n has no solution, making it the first even nontotient (see Euler's totient function).
14 is a Catalan number, the only semiprime among all Catalan numbers.
Take a set of real numbers and apply the closure and complement operations to it in any possible sequence. At most 14 distinct sets can be generated in this way. This holds even if the reals are replaced by a more general topological space. See Kuratowski's closure-complement problem.
Fourteen is a Keith number in base 10: 1, 4, 5, 9, 14, 23, 37, 60, 97, 157...
Fourteen is an open meandric number.
Fourteen is a Companion Pell number.
According to the Shapiro inequality 14 is the least number n such that there exist such that
There are fourteen possible Bravais lattices that fill three-dimensional space.
The cuboctahedron, the truncated cube, and the truncated octahedron each have fourteen faces. The rhombic dodecahedron, which tessellates 3-dimensional space and is the dual of the cuboctahedron, has fourteen vertices. The truncated octahedron, which also tessellates 3-dimensional space, is the only permutohedron.
- The Saros number of the solar eclipse series which began on July 31, 2568 B.C. and ended on February 6, B.C. 1035. The duration of Saros series 14 was 1532.5 years, and it contained 86 solar eclipses
- The Saros number of the lunar eclipse series which began on June 1, 2230 B.C. and ended on July 19, 932 B.C. The duration of Saros series 14 was 1298.1 years, and it contained 73 lunar eclipses.
- Age 14 is the earliest that the emancipation of minors can occur in the U.S.
- Minimum age a person can purchase, rent or buy tickets to a 14A rated movie in Canada without an adult. Rating are provincial, so ratings may vary. A movie can be 14A in one or some provinces and PG in other provinces. A movie can also be rated 14A in one or some provinces and 18A in other provinces. Quebec has a different rating system for films.
- Youngest age in Canada a person can watch a 14+ rated show without consent from a legal guardian.
- Minimum age at which one can view, rent, purchase, or buy tickets to an 18A rated movie with an accompanying adult in the Canadian provinces of the Maritimes and Manitoba.
- Minimum age at which one can work in many U.S states. Some require parental consent while others don't.
- Minimum age at which one can work in most Australian states with parent's consent.
- Minimum age at which one can drive a vehicle in the U.S. with a driver's license (with supervision of an adult over 18 years of age, and with a valid, unmarked driver's license, and at least 365 days of experience driving an actual automobile)
- The minimum age limit to drive a 50cc motorbike in Italy.
- The G-14 is a now-defunct union of eighteen football clubs.
- In Association football: The number 14, was the number for Johan Cruyff. Therefore he is often associated with that number and the football club AFC Ajax promised (in 2007) in his honour never to use it again.
- In rugby union:
- The starting right wing wears the 14 shirt.
- The Top 14 is the highest-level league in French rugby union.
- The Southern Hemisphere competition now known as Super Rugby was known from 2006 through 2010, an era in which it had 14 teams, as Super 14.
- The jersey number 14 has been retired by several North American sports teams in honor of past playing greats or other key figures:
- In Major League Baseball:
- The Boston Red Sox, for Hall of Famer Jim Rice.
- The Chicago Cubs, for Hall of Famer Ernie Banks.
- The Cleveland Indians, for Hall of Fame player Larry Doby, who also managed the team.
- The Minnesota Twins, for Kent Hrbek.
- The New York Mets, for Gil Hodges, who both played for and managed the team.
- The Philadelphia Phillies, for Hall of Famer Jim Bunning.
- The St. Louis Cardinals, for Ken Boyer.
- The Seattle Mariners have yet to retire any numbers, but have not issued #14 since Lou Piniella, manager from 1993 to 2002, left the team.
- The Cincinnati Reds have taken #14 out of circulation since Pete Rose accepted a place on MLB's banned list in 1989 for allegedly betting on games (which he would admit to in 2004). Because of the ban, the Reds cannot retire the number for Rose during his lifetime; they have since only issued the number to his son.
- In the NBA:
- In the NFL:
- In the NHL:
White Pride symbol
Among White Nationalists, 14 signifies the "Fourteen Words"—"We must secure the existence of our people and a future for white children"—attributed to David Lane. Often found in combination with 88 (1488, 8814, 14/88, etc.).
In other fields
- The number of days in a fortnight.
- In traditional British units of weight, the number of pounds in a stone.
- A number 'encoded' in much of the music of Johann Sebastian Bach. Bach may have considered this number a sort of signature, since given A = 1, B = 2, C = 3, etc., then B + A + C + H = 14. (See also 41)
- The number of points outlined by president Woodrow Wilson for reconstructing a new Europe following World War I, see Fourteen Points.
- The section that you go to when you die in the Grailquest books.
- The number of legs on a woodlouse, as well as on Hallucigenia.
- A common designation for the thirteenth floor in many buildings for superstitious reasons
- The number of points in a proposed republican constitution of the United Kingdom
- The number of lines in a sonnet.
- The Number 14 airship by Alberto Santos Dumont that was used to test the aerodynamics of his 14-bis airplane.
- The number of the French department Calvados
- A Storage server manufactured by IBM. It goes by name of "XIV" and is pronounced as the separate letters "X", "I", "V".
- The Piano Sonata No. 14, also known as Moonlight Sonata, is one of the most famous piano sonatas composed by Ludwig van Beethoven.
14 A.D., 14 B.C., 1914 etc.
- ^ The vowels of the syllables four- and for- are identical in many dialects, such as General American and younger speakers of Received Pronunciation.