20620056612 has 12 divisors (see below), whose sum is σ = 48113465456. Its totient is φ = 6873352200.

The previous prime is 20620056593. The next prime is 20620056637. The reversal of 20620056612 is 21665002602.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20620056612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859169014 + ... + 859169037.

Almost surely, 2^20620056612 is an apocalyptic number.

It is an amenable number.

20620056612 is an abundant number, since it is smaller than the sum of its proper divisors (27493408844).

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

20620056612 is a wasteful number, since it uses less digits than its factorization.

20620056612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718338058 (or 1718338056 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 20620056612 in words is "twenty billion, six hundred twenty million, fifty-six thousand, six hundred twelve".