18668012 has 12 divisors (see below), whose sum is σ = 35639016. Its totient is φ = 8485440.

The previous prime is 18668011. The next prime is 18668021. The reversal of 18668012 is 21086681.

It is a self number, because there is not a number n which added to its sum of digits gives 18668012.

It is not an unprimeable number, because it can be changed into a prime (18668011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212093 + ... + 212180.

It is an arithmetic number, because the mean of its divisors is an integer number (2969918).

Almost surely, 2^18668012 is an apocalyptic number.

It is an amenable number.

18668012 is a deficient number, since it is larger than the sum of its proper divisors (16971004).

18668012 is a wasteful number, since it uses less digits than its factorization.

18668012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424288 (or 424286 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18668012 is about 4320.6494882135. The cubic root of 18668012 is about 265.2768531808.

The spelling of 18668012 in words is "eighteen million, six hundred sixty-eight thousand, twelve".