18232732 has 12 divisors (see below), whose sum is σ = 36465520. Its totient is φ = 7814016.

The previous prime is 18232727. The next prime is 18232733. The reversal of 18232732 is 23723281.

18232732 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 651169 = 18232732 / (1 + 8 + 2 + 3 + 2 + 7 + 3 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 18232732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232733) 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, 325557 + ... + 325612.

Almost surely, 2^18232732 is an apocalyptic number.

It is an amenable number.

18232732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18232732 is a wasteful number, since it uses less digits than its factorization.

18232732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651180 (or 651178 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 18232732 is about 4269.9803278235. The cubic root of 18232732 is about 263.1988068238.

The spelling of 18232732 in words is "eighteen million, two hundred thirty-two thousand, seven hundred thirty-two".