# 22 (number)

 ← 21 22 23 →
Cardinal twenty-two
Ordinal 22nd
(twenty-second)
Factorization 2 × 11
Divisors 1, 2, 11, 22
Greek numeral ΚΒ´
Roman numeral XXII
Binary 101102
Ternary 2113
Quaternary 1124
Quinary 425
Senary 346
Octal 268
Duodecimal 1A12
Vigesimal 1220
Base 36 M36

22 (twenty-two) is the natural number following 21 and preceding 23.

## In mathematics

When cutting a circle with just six line segments, the maximum number of pieces that can be so created is 22,[3] thus 22 is a central polygonal number (see lazy caterer's sequence).[4]

## In aircraft

• 22 is the designation of the USAF stealth fighter, the F-22 Raptor.

## In art, entertainment, and media

### In other fields

• In bingo, 22 is referred to as "Two Little Ducks"
• Catch-22 (1961), Joseph Heller's novel, and its 1970 film version) by Joseph Heller, adaptation gave rise to the expression of logic "catch-22"
• Revista 22 is a magazine published in Romania
• There are 22 stars in the Paramount Pictures logo.
• "Twenty Two" (February 10, 1961) is Season 2–episode 17 (February 10, 1961) of the 1959-64 TV series The Twilight Zone, in which a hospitalized dancer has nightmares about a sinister nurse inviting her to Room 22, the hospital morgue.
• Traditional Tarot decks have 22 cards with allegorical subjects. These serve as trump cards in the game, the Fool is usually a kind of wild-card among the trumps and unnumbered, so the highest trump is numbered 21. Occult Tarot decks usually have 22 similar cards which are called Major Arcana by fortune-tellers. Occultists have related this number to the 22 letters of the Hebrew alphabet and the 22 paths in the Kabbalistic Tree of Life.

## In sports

• In soccer there are 22 players that start a game and the maximum number of players playing at any time.
• In Australian rules football, each team is allowed a squad of 22 players (18 on the field and 4 interchanges).
• The length of a cricket pitch is 22 yards.
• In rugby union, the "22" is a line in each half of the field which is 22 meters from the respective try line. It has significance in a number of laws particularly relating to kicking the ball away.

## In other uses

Twenty-two may also refer to: