18680136 has 32 divisors (see below), whose sum is σ = 47401440. Its totient is φ = 6133248.

The previous prime is 18680113. The next prime is 18680141. The reversal of 18680136 is 63108681.

It is a junction number, because it is equal to n+sod(n) for n = 18680097 and 18680106.

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, 4201 + ... + 7416.

It is an arithmetic number, because the mean of its divisors is an integer number (1481295).

Almost surely, 2^18680136 is an apocalyptic number.

It is an amenable number.

18680136 is an abundant number, since it is smaller than the sum of its proper divisors (28721304).

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

18680136 is a wasteful number, since it uses less digits than its factorization.

18680136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11693 (or 11689 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18680136 is about 4322.0522902899. The cubic root of 18680136 is about 265.3342690528.

The spelling of 18680136 in words is "eighteen million, six hundred eighty thousand, one hundred thirty-six".