18665698904 has 16 divisors (see below), whose sum is σ = 35571927120. Its totient is φ = 9179851680.

The previous prime is 18665698867. The next prime is 18665698943. The reversal of 18665698904 is 40989656681.

It is a happy number.

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, 19124204 + ... + 19125179.

It is an arithmetic number, because the mean of its divisors is an integer number (2223245445).

Almost surely, 2^18665698904 is an apocalyptic number.

It is an amenable number.

18665698904 is a deficient number, since it is larger than the sum of its proper divisors (16906228216).

18665698904 is a wasteful number, since it uses less digits than its factorization.

18665698904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38249450 (or 38249446 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 62.

The spelling of 18665698904 in words is "eighteen billion, six hundred sixty-five million, six hundred ninety-eight thousand, nine hundred four".