21857507889030 has 96 divisors (see below), whose sum is σ = 62031868543008. Its totient is φ = 5295710476800.

The previous prime is 21857507888977. The next prime is 21857507889073. The reversal of 21857507889030 is 3098870575812.

21857507889030 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 7 + 507 + 8 + 8 + 90 + 30 = 666.

It is a super-2 number, since 2×21857507889030² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4710589 + ... + 8118168.

It is an arithmetic number, because the mean of its divisors is an integer number (646165297323).

Almost surely, 2^{21857507889030} is an apocalyptic number.

21857507889030 is an abundant number, since it is smaller than the sum of its proper divisors (40174360653978).

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

21857507889030 is a wasteful number, since it uses less digits than its factorization.

21857507889030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830502 (or 12830499 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 63.

The spelling of 21857507889030 in words is "twenty-one trillion, eight hundred fifty-seven billion, five hundred seven million, eight hundred eighty-nine thousand, thirty".