18992911664 has 40 divisors (see below), whose sum is σ = 38751076320. Its totient is φ = 9000211968.

The previous prime is 18992911657. The next prime is 18992911697. The reversal of 18992911664 is 46611929981.

It is an unprimeable number.

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, 196637 + ... + 276860.

It is an arithmetic number, because the mean of its divisors is an integer number (968776908).

Almost surely, 2^18992911664 is an apocalyptic number.

It is an amenable number.

18992911664 is an abundant number, since it is smaller than the sum of its proper divisors (19758164656).

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

18992911664 is a wasteful number, since it uses less digits than its factorization.

18992911664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473637 (or 473631 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 56.

The spelling of 18992911664 in words is "eighteen billion, nine hundred ninety-two million, nine hundred eleven thousand, six hundred sixty-four".