18512144 has 20 divisors (see below), whose sum is σ = 40991424. Its totient is φ = 7933728.

The previous prime is 18512113. The next prime is 18512161. The reversal of 18512144 is 44121581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82532 + ... + 82755.

Almost surely, 2^18512144 is an apocalyptic number.

18512144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18512144 is an abundant number, since it is smaller than the sum of its proper divisors (22479280).

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

18512144 is a wasteful number, since it uses less digits than its factorization.

18512144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165302 (or 165296 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 18512144 is about 4302.5741132490. The cubic root of 18512144 is about 264.5364817587.

The spelling of 18512144 in words is "eighteen million, five hundred twelve thousand, one hundred forty-four".