20837311864 has 32 divisors (see below), whose sum is σ = 40012323120. Its totient is φ = 10167768576.

The previous prime is 20837311861. The next prime is 20837311903. The reversal of 20837311864 is 46811373802.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 20837311864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20837311861) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 392304 + ... + 442240.

Almost surely, 2^20837311864 is an apocalyptic number.

It is an amenable number.

20837311864 is a deficient number, since it is larger than the sum of its proper divisors (19175011256).

20837311864 is a wasteful number, since it uses less digits than its factorization.

20837311864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51199 (or 51195 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20837311864 in words is "twenty billion, eight hundred thirty-seven million, three hundred eleven thousand, eight hundred sixty-four".