20993072536 has 16 divisors (see below), whose sum is σ = 39384491400. Its totient is φ = 10490541504.

The previous prime is 20993072461. The next prime is 20993072549. The reversal of 20993072536 is 63527039902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734446 + ... + 762493.

Almost surely, 2^20993072536 is an apocalyptic number.

It is an amenable number.

20993072536 is a deficient number, since it is larger than the sum of its proper divisors (18391418864).

20993072536 is a wasteful number, since it uses less digits than its factorization.

20993072536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498698 (or 1498694 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 46.

The spelling of 20993072536 in words is "twenty billion, nine hundred ninety-three million, seventy-two thousand, five hundred thirty-six".