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Twenty-two (22) is a positive integer one more than 21 and one less than 23.</p>

PropertiesEdit

  • 22 is a composite number, factoring into 2*11.
  • 22 is a palindrone; switching the digits makes no change to its value.
  • 22 is known as a repdigit because it is made exclusively of 2's.

In googology Edit

Twenty-twos, a googologism with a similar name to this number, is equal to 20 copies of 2, or 10 copies of 22.

The numbers dumevalka, dutridumevalka, duquodumevalka are defined as 2[2,2], 2[3,2], 2[4,2] respectively, using SpongeTechX's copy notation.[1] They are all equal to 22, since 2[2,2] = 2[[2]] = 2[2] = 22, 2[3,2] = 2[[[2]]] = 2[[2]] = 22, 2[4,2] = 2[[[[2]]]] = 2[[[2]]] = 22.

Sources Edit

  1. STX Googology