18166492 has 12 divisors (see below), whose sum is σ = 32391576. Its totient is φ = 8911760.

The previous prime is 18166483. The next prime is 18166493. The reversal of 18166492 is 29466181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18166493) 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, 42634 + ... + 43057.

It is an arithmetic number, because the mean of its divisors is an integer number (2699298).

Almost surely, 2^18166492 is an apocalyptic number.

It is an amenable number.

18166492 is a deficient number, since it is larger than the sum of its proper divisors (14225084).

18166492 is a wasteful number, since it uses less digits than its factorization.

18166492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85748 (or 85746 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 18166492 is about 4262.2167941108. The cubic root of 18166492 is about 262.8796839635.

The spelling of 18166492 in words is "eighteen million, one hundred sixty-six thousand, four hundred ninety-two".