18187332 has 24 divisors (see below), whose sum is σ = 44671200. Its totient is φ = 5743296.

The previous prime is 18187327. The next prime is 18187349. The reversal of 18187332 is 23378181.

It is a junction number, because it is equal to n+sod(n) for n = 18187293 and 18187302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39657 + ... + 40112.

It is an arithmetic number, because the mean of its divisors is an integer number (1861300).

Almost surely, 2^18187332 is an apocalyptic number.

18187332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18187332 is an abundant number, since it is smaller than the sum of its proper divisors (26483868).

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

18187332 is a wasteful number, since it uses less digits than its factorization.

18187332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79795 (or 79793 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 18187332 is about 4264.6608305937. The cubic root of 18187332 is about 262.9801678482.

The spelling of 18187332 in words is "eighteen million, one hundred eighty-seven thousand, three hundred thirty-two".