18032232 has 16 divisors (see below), whose sum is σ = 45080640. Its totient is φ = 6010736.

The previous prime is 18032227. The next prime is 18032233. The reversal of 18032232 is 23223081.

It is a super-2 number, since 2×18032232² = 650322781803648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18032199 and 18032208.

It is not an unprimeable number, because it can be changed into a prime (18032233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375648 + ... + 375695.

It is an arithmetic number, because the mean of its divisors is an integer number (2817540).

Almost surely, 2^18032232 is an apocalyptic number.

18032232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18032232 is an abundant number, since it is smaller than the sum of its proper divisors (27048408).

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

18032232 is a wasteful number, since it uses less digits than its factorization.

18032232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751352 (or 751348 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 18032232 is about 4246.4375657720. The cubic root of 18032232 is about 262.2304752847.

The spelling of 18032232 in words is "eighteen million, thirty-two thousand, two hundred thirty-two".