22

22 < 21 | 23 >
Numbers 0 - 99
0	1	2	3	4	5	6	7	8	9
10	11	12	13	14	15	16	17	18	19
20	21	22	23	24	25	26	27	28	29
30	31	32	33	34	35	36	37	38	39
40	41	42	43	44	45	46	47	48	49
50	51	52	53	54	55	56	57	58	59
60	61	62	63	64	65	66	67	68	69
70	71	72	73	74	75	76	77	78	79
80	81	82	83	84	85	86	87	88	89
90	91	92	93	94	95	96	97	98	99

22 (twenty-two) is a positive integer following 21 and preceding 23. Its ordinal form is written "22nd" or "twenty-second".

Properties

• 22 is an even composite number.
• 22 is a repdigit number
• 22 is the 4th pentagonal number.
• 22 is deficient.

In googology

• In Greek-based number-naming systems, 22 is associated with prefix "duicosa-", and with prefix "duoviginti-" in Latin systems.
• 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[2,3], 2[2,4] respectively, using SpongeTechX's copy notation. They are all equal to 22, since 2[2,2] = 2[[2]] = 2[2] = 22, 2[2,3] = 2[[[2]]] = 2[[2]] = 22, 2[2,4] = 2[[[[2]]]] = 2[[[2]]] = 22.

• BlankEntity coined the name Weak Tritri for this number, and it's equal to b[3,3,3] using Weak-b notation.^{[dead link]}
• DeepLineMadom calls the number unoo-dodecol.

In pop culture

In the video Marmalade - Words of the World, the etymologist Mark Sabine pronounces the word "marmalade" in English a total of 22 times.