18992164 has 9 divisors (see below), whose sum is σ = 33251547. Its totient is φ = 9491724.

The previous prime is 18992161. The next prime is 18992209. The reversal of 18992164 is 46129981.

The square root of 18992164 is 4358.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18992161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7627 + ... + 9805.

Almost surely, 2^18992164 is an apocalyptic number.

18992164 is the 4358-th square number.

It is an amenable number.

18992164 is a deficient number, since it is larger than the sum of its proper divisors (14259383).

18992164 is an frugal number, since it uses more digits than its factorization.

18992164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362 (or 2181 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The cubic root of 18992164 is about 266.8034763275.

The spelling of 18992164 in words is "eighteen million, nine hundred ninety-two thousand, one hundred sixty-four".