18986472 has 48 divisors (see below), whose sum is σ = 54132000. Its totient is φ = 5995296.

The previous prime is 18986447. The next prime is 18986483. The reversal of 18986472 is 27468981.

It is a super-2 number, since 2×18986472² = 720972238013568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5572 + ... + 8307.

It is an arithmetic number, because the mean of its divisors is an integer number (1127750).

Almost surely, 2^18986472 is an apocalyptic number.

18986472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18986472 is an abundant number, since it is smaller than the sum of its proper divisors (35145528).

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

18986472 is a wasteful number, since it uses less digits than its factorization.

18986472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910 (or 13903 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 18986472 is about 4357.3468992037. The cubic root of 18986472 is about 266.7768197701.

The spelling of 18986472 in words is "eighteen million, nine hundred eighty-six thousand, four hundred seventy-two".