18313686 has 24 divisors (see below), whose sum is σ = 39783744. Its totient is φ = 6088560.

The previous prime is 18313661. The next prime is 18313693. The reversal of 18313686 is 68631381.

It is a self number, because there is not a number n which added to its sum of digits gives 18313686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7195 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (1657656).

Almost surely, 2^18313686 is an apocalyptic number.

18313686 is an abundant number, since it is smaller than the sum of its proper divisors (21470058).

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

18313686 is a wasteful number, since it uses less digits than its factorization.

18313686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676 (or 2673 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18313686 is about 4279.4492636319. The cubic root of 18313686 is about 263.5877691791.

The spelling of 18313686 in words is "eighteen million, three hundred thirteen thousand, six hundred eighty-six".