18712984 has 16 divisors (see below), whose sum is σ = 36612720. Its totient is φ = 8949600.

The previous prime is 18712943. The next prime is 18713027. The reversal of 18712984 is 48921781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50667 + ... + 51034.

It is an arithmetic number, because the mean of its divisors is an integer number (2288295).

Almost surely, 2^18712984 is an apocalyptic number.

It is an amenable number.

18712984 is a deficient number, since it is larger than the sum of its proper divisors (17899736).

18712984 is a wasteful number, since it uses less digits than its factorization.

18712984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101730 (or 101726 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 18712984 is about 4325.8506677878. The cubic root of 18712984 is about 265.4897032595.

The spelling of 18712984 in words is "eighteen million, seven hundred twelve thousand, nine hundred eighty-four".