20236930656 has 36 divisors (see below), whose sum is σ = 53125602012. Its totient is φ = 6745178944.

The previous prime is 20236930639. The next prime is 20236930661. The reversal of 20236930656 is 65603963202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1386565 + ... + 1401083.

It is an arithmetic number, because the mean of its divisors is an integer number (1475711167).

Almost surely, 2^20236930656 is an apocalyptic number.

It is an amenable number.

20236930656 is an abundant number, since it is smaller than the sum of its proper divisors (32888671356).

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

20236930656 is an frugal number, since it uses more digits than its factorization.

20236930656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29051 (or 14524 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 20236930656 in words is "twenty billion, two hundred thirty-six million, nine hundred thirty thousand, six hundred fifty-six".