18507868 has 12 divisors (see below), whose sum is σ = 33433792. Its totient is φ = 8955360.

The previous prime is 18507859. The next prime is 18507871. The reversal of 18507868 is 86870581.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74505 + ... + 74752.

Almost surely, 2^18507868 is an apocalyptic number.

It is an amenable number.

18507868 is a deficient number, since it is larger than the sum of its proper divisors (14925924).

18507868 is a wasteful number, since it uses less digits than its factorization.

18507868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149292 (or 149290 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 18507868 is about 4302.0771727155. The cubic root of 18507868 is about 264.5161123352.

The spelling of 18507868 in words is "eighteen million, five hundred seven thousand, eight hundred sixty-eight".