18266916 has 24 divisors (see below), whose sum is σ = 43615264. Its totient is φ = 5947200.

The previous prime is 18266887. The next prime is 18266939. The reversal of 18266916 is 61966281.

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, 17185 + ... + 18216.

Almost surely, 2^18266916 is an apocalyptic number.

It is an amenable number.

18266916 is an abundant number, since it is smaller than the sum of its proper divisors (25348348).

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

18266916 is a wasteful number, since it uses less digits than its factorization.

18266916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35451 (or 35449 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 18266916 is about 4273.9812821303. The cubic root of 18266916 is about 263.3631919712.

The spelling of 18266916 in words is "eighteen million, two hundred sixty-six thousand, nine hundred sixteen".