20620211564 has 12 divisors (see below), whose sum is σ = 36086679888. Its totient is φ = 10309731600.

The previous prime is 20620211543. The next prime is 20620211603. The reversal of 20620211564 is 46511202602.

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 3 ways as a sum of consecutive naturals, for example, 57569 + ... + 211079.

It is an arithmetic number, because the mean of its divisors is an integer number (3007223324).

Almost surely, 2^20620211564 is an apocalyptic number.

It is an amenable number.

20620211564 is a deficient number, since it is larger than the sum of its proper divisors (15466468324).

20620211564 is a wasteful number, since it uses less digits than its factorization.

20620211564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187096 (or 187094 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 20620211564 in words is "twenty billion, six hundred twenty million, two hundred eleven thousand, five hundred sixty-four".