18697136 has 20 divisors (see below), whose sum is σ = 37205952. Its totient is φ = 9095616.

The previous prime is 18697057. The next prime is 18697139. The reversal of 18697136 is 63179681.

It is a junction number, because it is equal to n+sod(n) for n = 18697093 and 18697102.

It is not an unprimeable number, because it can be changed into a prime (18697139) 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, 15200 + ... + 16383.

Almost surely, 2^18697136 is an apocalyptic number.

18697136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18697136 is a deficient number, since it is larger than the sum of its proper divisors (18508816).

18697136 is a wasteful number, since it uses less digits than its factorization.

18697136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31628 (or 31622 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 18697136 is about 4324.0185013480. The cubic root of 18697136 is about 265.4147344722.

The spelling of 18697136 in words is "eighteen million, six hundred ninety-seven thousand, one hundred thirty-six".