18805136 has 40 divisors (see below), whose sum is σ = 43836480. Its totient is φ = 7634304.

The previous prime is 18805133. The next prime is 18805159. The reversal of 18805136 is 63150881.

It is not an unprimeable number, because it can be changed into a prime (18805133) 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, 2291 + ... + 6546.

It is an arithmetic number, because the mean of its divisors is an integer number (1095912).

Almost surely, 2^18805136 is an apocalyptic number.

18805136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18805136 is an abundant number, since it is smaller than the sum of its proper divisors (25031344).

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

18805136 is a wasteful number, since it uses less digits than its factorization.

18805136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8871 (or 8865 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18805136 is about 4336.4889023264. The cubic root of 18805136 is about 265.9247907673.

The spelling of 18805136 in words is "eighteen million, eight hundred five thousand, one hundred thirty-six".