18685976 has 32 divisors (see below), whose sum is σ = 36504000. Its totient is φ = 8956416.

The previous prime is 18685973. The next prime is 18685981. The reversal of 18685976 is 67958681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18685973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55280 + ... + 55616.

It is an arithmetic number, because the mean of its divisors is an integer number (1140750).

Almost surely, 2^18685976 is an apocalyptic number.

It is an amenable number.

18685976 is a deficient number, since it is larger than the sum of its proper divisors (17818024).

18685976 is a wasteful number, since it uses less digits than its factorization.

18685976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 607 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 18685976 is about 4322.7278424624. The cubic root of 18685976 is about 265.3619167936.

The spelling of 18685976 in words is "eighteen million, six hundred eighty-five thousand, nine hundred seventy-six".