20620625256 has 192 divisors, whose sum is σ = 70178734080. Its totient is φ = 5313651840.

The previous prime is 20620625237. The next prime is 20620625261. The reversal of 20620625256 is 65252602602.

20620625256 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 625 + 25 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20620625256.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 689445 + ... + 718731.

It is an arithmetic number, because the mean of its divisors is an integer number (365514240).

Almost surely, 2^20620625256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20620625256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35089367040).

20620625256 is an abundant number, since it is smaller than the sum of its proper divisors (49558108824).

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

20620625256 is a wasteful number, since it uses less digits than its factorization.

20620625256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29444 (or 29437 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20620625256 in words is "twenty billion, six hundred twenty million, six hundred twenty-five thousand, two hundred fifty-six".