20364540564 has 24 divisors (see below), whose sum is σ = 47605108768. Its totient is φ = 6775630560.

The previous prime is 20364540517. The next prime is 20364540571. The reversal of 20364540564 is 46504546302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561942 + ... + 1574925.

Almost surely, 2^20364540564 is an apocalyptic number.

It is an amenable number.

20364540564 is an abundant number, since it is smaller than the sum of its proper divisors (27240568204).

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

20364540564 is a wasteful number, since it uses less digits than its factorization.

20364540564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137415 (or 3137413 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 20364540564 in words is "twenty billion, three hundred sixty-four million, five hundred forty thousand, five hundred sixty-four".