18690806915 has 16 divisors (see below), whose sum is σ = 24471486720. Its totient is φ = 13591357920.

The previous prime is 18690806903. The next prime is 18690806929. The reversal of 18690806915 is 51960809681.

It is not a de Polignac number, because 18690806915 - 2¹⁰ = 18690805891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441026 + ... + 481544.

It is an arithmetic number, because the mean of its divisors is an integer number (1529467920).

Almost surely, 2^18690806915 is an apocalyptic number.

18690806915 is a deficient number, since it is larger than the sum of its proper divisors (5780679805).

18690806915 is a wasteful number, since it uses less digits than its factorization.

18690806915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48922.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 18690806915 in words is "eighteen billion, six hundred ninety million, eight hundred six thousand, nine hundred fifteen".