20791542056 has 8 divisors (see below), whose sum is σ = 38984141370. Its totient is φ = 10395771024.

The previous prime is 20791542049. The next prime is 20791542067. The reversal of 20791542056 is 65024519702.

It can be written as a sum of positive squares in only one way, i.e., 19024684900 + 1766857156 = 137930^2 + 42034^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1299471371 + ... + 1299471386.

Almost surely, 2^20791542056 is an apocalyptic number.

It is an amenable number.

20791542056 is a deficient number, since it is larger than the sum of its proper divisors (18192599314).

20791542056 is a wasteful number, since it uses less digits than its factorization.

20791542056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598942763 (or 2598942759 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 20791542056 in words is "twenty billion, seven hundred ninety-one million, five hundred forty-two thousand, fifty-six".