20561976711306 has 48 divisors (see below), whose sum is σ = 45596270888064. Its totient is φ = 6693798112512.

The previous prime is 20561976711233. The next prime is 20561976711347. The reversal of 20561976711306 is 60311767916502.

20561976711306 is a `hidden beast` number, since 2 + 0 + 5 + 619 + 7 + 6 + 7 + 1 + 13 + 0 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25627335 + ... + 26417498.

It is an arithmetic number, because the mean of its divisors is an integer number (949922310168).

Almost surely, 2^{20561976711306} is an apocalyptic number.

20561976711306 is an abundant number, since it is smaller than the sum of its proper divisors (25034294176758).

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

20561976711306 is a wasteful number, since it uses less digits than its factorization.

20561976711306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52045355 (or 52045352 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 20561976711306 in words is "twenty trillion, five hundred sixty-one billion, nine hundred seventy-six million, seven hundred eleven thousand, three hundred six".