18660916 has 12 divisors (see below), whose sum is σ = 32700640. Its totient is φ = 9317880.

The previous prime is 18660911. The next prime is 18660931. The reversal of 18660916 is 61906681.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18660911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721 + ... + 6151.

Almost surely, 2^18660916 is an apocalyptic number.

It is an amenable number.

18660916 is a deficient number, since it is larger than the sum of its proper divisors (14039724).

18660916 is a wasteful number, since it uses less digits than its factorization.

18660916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294 (or 6292 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 18660916 is about 4319.8282373261. The cubic root of 18660916 is about 265.2432369766.

The spelling of 18660916 in words is "eighteen million, six hundred sixty thousand, nine hundred sixteen".