18057432 has 32 divisors (see below), whose sum is σ = 45327600. Its totient is φ = 5994624.

The previous prime is 18057421. The next prime is 18057437. The reversal of 18057432 is 23475081.

It is a self number, because there is not a number n which added to its sum of digits gives 18057432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18057437) 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, 5058 + ... + 7854.

Almost surely, 2^18057432 is an apocalyptic number.

18057432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18057432 is an abundant number, since it is smaller than the sum of its proper divisors (27270168).

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

18057432 is a wasteful number, since it uses less digits than its factorization.

18057432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 18057432 is about 4249.4037228769. The cubic root of 18057432 is about 262.3525739069.

The spelling of 18057432 in words is "eighteen million, fifty-seven thousand, four hundred thirty-two".