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21769915122 = 2328324192
BaseRepresentation
bin10100010001100101…
…101000101011110010
32002012011221021100200
4110101211220223302
5324041044240442
614000112500030
71400323140204
oct242145505362
962164837320
1021769915122
11926160549a
12427684a616
13208c2931a7
1410a73aa774
1587633034c
hex511968af2

21769915122 has 54 divisors (see below), whose sum is σ = 47857505007. Its totient is φ = 7152098712.

The previous prime is 21769915121. The next prime is 21769915151. The reversal of 21769915122 is 22151996712.

It can be written as a sum of positive squares in only one way, i.e., 10884957561 + 10884957561 = 104331^2 + 104331^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=104331.

It is not an unprimeable number, because it can be changed into a prime (21769915121) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 51956629 + ... + 51957047.

Almost surely, 221769915122 is an apocalyptic number.

21769915122 is an abundant number, since it is smaller than the sum of its proper divisors (26087589885).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21769915122 is an frugal number, since it uses more digits than its factorization.

21769915122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 507 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The spelling of 21769915122 in words is "twenty-one billion, seven hundred sixty-nine million, nine hundred fifteen thousand, one hundred twenty-two".

Divisors: 1 2 3 6 9 18 83 166 249 419 498 747 838 1257 1494 2514 3771 6889 7542 13778 20667 34777 41334 62001 69554 104331 124002 175561 208662 312993 351122 526683 625986 1053366 1580049 2886491 3160098 5772982 8659473 14571563 17318946 25978419 29143126 43714689 51956838 87429378 131144067 262288134 1209439729 2418879458 3628319187 7256638374 10884957561 21769915122