18864012 has 24 divisors (see below), whose sum is σ = 44086896. Its totient is φ = 6277888.

The previous prime is 18863987. The next prime is 18864023. The reversal of 18864012 is 21046881.

It is a super-2 number, since 2×18864012² = 711701897472288, which contains 22 as substring.

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, 12448 + ... + 13880.

It is an arithmetic number, because the mean of its divisors is an integer number (1836954).

Almost surely, 2^18864012 is an apocalyptic number.

18864012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18864012 is an abundant number, since it is smaller than the sum of its proper divisors (25222884).

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

18864012 is a wasteful number, since it uses less digits than its factorization.

18864012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537 (or 2535 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18864012 is about 4343.2720384521. The cubic root of 18864012 is about 266.2020249031.

The spelling of 18864012 in words is "eighteen million, eight hundred sixty-four thousand, twelve".