20656123432 has 16 divisors (see below), whose sum is σ = 44263121760. Its totient is φ = 8852624304.

The previous prime is 20656123417. The next prime is 20656123441. The reversal of 20656123432 is 23432165602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184429618 + ... + 184429729.

It is an arithmetic number, because the mean of its divisors is an integer number (2766445110).

Almost surely, 2^20656123432 is an apocalyptic number.

It is an amenable number.

20656123432 is an abundant number, since it is smaller than the sum of its proper divisors (23606998328).

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

20656123432 is a wasteful number, since it uses less digits than its factorization.

20656123432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368859360 (or 368859356 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 20656123432 in words is "twenty billion, six hundred fifty-six million, one hundred twenty-three thousand, four hundred thirty-two".