20465061872256 has 128 divisors (see below), whose sum is σ = 60402021278400. Its totient is φ = 6821499239424.

The previous prime is 20465061872207. The next prime is 20465061872279. The reversal of 20465061872256 is 65227816056402.

20465061872256 is a `hidden beast` number, since 2 + 0 + 4 + 6 + 506 + 1 + 87 + 2 + 2 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187996915 + ... + 188105741.

Almost surely, 2^{20465061872256} is an apocalyptic number.

It is an amenable number.

20465061872256 is an abundant number, since it is smaller than the sum of its proper divisors (39936959406144).

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

20465061872256 is a wasteful number, since it uses less digits than its factorization.

20465061872256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163263 (or 163245 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 20465061872256 in words is "twenty trillion, four hundred sixty-five billion, sixty-one million, eight hundred seventy-two thousand, two hundred fifty-six".