18966912 has 32 divisors (see below), whose sum is σ = 50381880. Its totient is φ = 6322176.

The previous prime is 18966901. The next prime is 18966931. The reversal of 18966912 is 21966981.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24313 + ... + 25080.

Almost surely, 2^18966912 is an apocalyptic number.

18966912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18966912 is an abundant number, since it is smaller than the sum of its proper divisors (31414968).

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

18966912 is an equidigital number, since it uses as much as digits as its factorization.

18966912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49410 (or 49398 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 18966912 is about 4355.1018357784. The cubic root of 18966912 is about 266.6851764929.

The spelling of 18966912 in words is "eighteen million, nine hundred sixty-six thousand, nine hundred twelve".