20712495756 has 24 divisors (see below), whose sum is σ = 48433552384. Its totient is φ = 6889251600.

The previous prime is 20712495737. The next prime is 20712495823. The reversal of 20712495756 is 65759421702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1858420 + ... + 1869531.

Almost surely, 2^20712495756 is an apocalyptic number.

It is an amenable number.

20712495756 is an abundant number, since it is smaller than the sum of its proper divisors (27721056628).

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

20712495756 is a wasteful number, since it uses less digits than its factorization.

20712495756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728421 (or 3728419 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 20712495756 in words is "twenty billion, seven hundred twelve million, four hundred ninety-five thousand, seven hundred fifty-six".