18407517868 has 12 divisors (see below), whose sum is σ = 32741241232. Its totient is φ = 9052877520.

The previous prime is 18407517859. The next prime is 18407517881. The reversal of 18407517868 is 86871570481.

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, 37720080 + ... + 37720567.

Almost surely, 2^18407517868 is an apocalyptic number.

It is an amenable number.

18407517868 is a deficient number, since it is larger than the sum of its proper divisors (14333723364).

18407517868 is a wasteful number, since it uses less digits than its factorization.

18407517868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75440712 (or 75440710 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 55.

The spelling of 18407517868 in words is "eighteen billion, four hundred seven million, five hundred seventeen thousand, eight hundred sixty-eight".