18870672 has 40 divisors (see below), whose sum is σ = 50871744. Its totient is φ = 6016384.

The previous prime is 18870647. The next prime is 18870689. The reversal of 18870672 is 27607881.

It is a super-2 number, since 2×18870672² = 712204523463168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18870672.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7443 + ... + 9650.

Almost surely, 2^18870672 is an apocalyptic number.

18870672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18870672 is an abundant number, since it is smaller than the sum of its proper divisors (32001072).

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

18870672 is a wasteful number, since it uses less digits than its factorization.

18870672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17127 (or 17121 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 18870672 is about 4344.0386738610. The cubic root of 18870672 is about 266.2333490436.

The spelling of 18870672 in words is "eighteen million, eight hundred seventy thousand, six hundred seventy-two".