18966080 has 56 divisors (see below), whose sum is σ = 51620928. Its totient is φ = 6501888.

The previous prime is 18966043. The next prime is 18966113. The reversal of 18966080 is 8066981.

It is a tau number, because it is divible by the number of its divisors (56).

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, 1994 + ... + 6473.

Almost surely, 2^18966080 is an apocalyptic number.

18966080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18966080 is an abundant number, since it is smaller than the sum of its proper divisors (32654848).

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

18966080 is an equidigital number, since it uses as much as digits as its factorization.

18966080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491 (or 8481 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 18966080 is about 4355.0063145764. The cubic root of 18966080 is about 266.6812769773.

The spelling of 18966080 in words is "eighteen million, nine hundred sixty-six thousand, eighty".