21957444162 has 24 divisors (see below), whose sum is σ = 47614386924. Its totient is φ = 7313005824.

The previous prime is 21957444151. The next prime is 21957444241. The reversal of 21957444162 is 26144475912.

21957444162 is a `hidden beast` number, since 2 + 19 + 574 + 4 + 4 + 1 + 62 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19934333721 + 2023110441 = 141189^2 + 44979^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489783 + ... + 532730.

Almost surely, 2^21957444162 is an apocalyptic number.

21957444162 is an abundant number, since it is smaller than the sum of its proper divisors (25656942762).

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

21957444162 is a wasteful number, since it uses less digits than its factorization.

21957444162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023714 (or 1023711 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 21957444162 in words is "twenty-one billion, nine hundred fifty-seven million, four hundred forty-four thousand, one hundred sixty-two".