18395685868 has 12 divisors (see below), whose sum is σ = 36791371792. Its totient is φ = 7883865360.

The previous prime is 18395685809. The next prime is 18395685877. The reversal of 18395685868 is 86858659381.

It is a happy number.

18395685868 is an admirable number.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328494363 + ... + 328494418.

Almost surely, 2^18395685868 is an apocalyptic number.

It is an amenable number.

18395685868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18395685868 is a wasteful number, since it uses less digits than its factorization.

18395685868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656988792 (or 656988790 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 67.

The spelling of 18395685868 in words is "eighteen billion, three hundred ninety-five million, six hundred eighty-five thousand, eight hundred sixty-eight".