18330732 has 48 divisors (see below), whose sum is σ = 54315520. Its totient is φ = 5237136.

The previous prime is 18330721. The next prime is 18330733. The reversal of 18330732 is 23703381.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18330696 and 18330705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18330733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11368 + ... + 12879.

Almost surely, 2^18330732 is an apocalyptic number.

18330732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18330732 is an abundant number, since it is smaller than the sum of its proper divisors (35984788).

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

18330732 is a wasteful number, since it uses less digits than its factorization.

18330732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24267 (or 24259 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 18330732 is about 4281.4404118240. The cubic root of 18330732 is about 263.6695244995.

The spelling of 18330732 in words is "eighteen million, three hundred thirty thousand, seven hundred thirty-two".