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21676662212 = 227197537087
BaseRepresentation
bin10100001100000001…
…111001110111000100
32001221200110112102012
4110030001321313010
5323343211142322
613542542033352
71365111405632
oct241401716704
961850415365
1021676662212
119213a02177
12424b578858
132075b7275a
141098c54352
1586d05eae2
hex50c079dc4

21676662212 has 12 divisors (see below), whose sum is σ = 37986923520. Its totient is φ = 10823255496.

The previous prime is 21676662211. The next prime is 21676662223. The reversal of 21676662212 is 21226667612.

It is a self number, because there is not a number n which added to its sum of digits gives 21676662212.

It is not an unprimeable number, because it can be changed into a prime (21676662211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3765668 + ... + 3771419.

It is an arithmetic number, because the mean of its divisors is an integer number (3165576960).

Almost surely, 221676662212 is an apocalyptic number.

It is an amenable number.

21676662212 is a deficient number, since it is larger than the sum of its proper divisors (16310261308).

21676662212 is a wasteful number, since it uses less digits than its factorization.

21676662212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537810 (or 7537808 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The spelling of 21676662212 in words is "twenty-one billion, six hundred seventy-six million, six hundred sixty-two thousand, two hundred twelve".

Divisors: 1 2 4 719 1438 2876 7537087 15074174 30148348 5419165553 10838331106 21676662212