20568713136 has 40 divisors (see below), whose sum is σ = 53174882304. Its totient is φ = 6851200320.

The previous prime is 20568713129. The next prime is 20568713141. The reversal of 20568713136 is 63131786502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91120 + ... + 222351.

Almost surely, 2^20568713136 is an apocalyptic number.

It is an amenable number.

20568713136 is an abundant number, since it is smaller than the sum of its proper divisors (32606169168).

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

20568713136 is a wasteful number, since it uses less digits than its factorization.

20568713136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314849 (or 314843 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 20568713136 in words is "twenty billion, five hundred sixty-eight million, seven hundred thirteen thousand, one hundred thirty-six".