20656652944 has 20 divisors (see below), whose sum is σ = 42376516524. Its totient is φ = 9720777728.

The previous prime is 20656652909. The next prime is 20656652953. The reversal of 20656652944 is 44925665602.

It can be written as a sum of positive squares in 2 ways, for example, as 11785273600 + 8871379344 = 108560^2 + 94188^2 .

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, 37971517 + ... + 37972060.

Almost surely, 2^20656652944 is an apocalyptic number.

It is an amenable number.

20656652944 is an abundant number, since it is smaller than the sum of its proper divisors (21719863580).

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

20656652944 is a wasteful number, since it uses less digits than its factorization.

20656652944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75943602 (or 75943596 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 20656652944 in words is "twenty billion, six hundred fifty-six million, six hundred fifty-two thousand, nine hundred forty-four".