20567537564 has 12 divisors (see below), whose sum is σ = 41135075184. Its totient is φ = 8814658944.

The previous prime is 20567537489. The next prime is 20567537581. The reversal of 20567537564 is 46573576502.

20567537564 is an admirable number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367277429 + ... + 367277484.

It is an arithmetic number, because the mean of its divisors is an integer number (3427922932).

Almost surely, 2^20567537564 is an apocalyptic number.

It is an amenable number.

20567537564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20567537564 is a wasteful number, since it uses less digits than its factorization.

20567537564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734554924 (or 734554922 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 50.

The spelling of 20567537564 in words is "twenty billion, five hundred sixty-seven million, five hundred thirty-seven thousand, five hundred sixty-four".