18668312 has 32 divisors (see below), whose sum is σ = 39916800. Its totient is φ = 8108544.

The previous prime is 18668303. The next prime is 18668323. The reversal of 18668312 is 21386681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3512 + ... + 7047.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^18668312 is an apocalyptic number.

It is an amenable number.

18668312 is an abundant number, since it is smaller than the sum of its proper divisors (21248488).

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

18668312 is a wasteful number, since it uses less digits than its factorization.

18668312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10595 (or 10591 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 18668312 is about 4320.6842050768. The cubic root of 18668312 is about 265.2782741968.

The spelling of 18668312 in words is "eighteen million, six hundred sixty-eight thousand, three hundred twelve".