18306732 has 12 divisors (see below), whose sum is σ = 42715736. Its totient is φ = 6102240.

The previous prime is 18306731. The next prime is 18306733. The reversal of 18306732 is 23760381.

It is an interprime number because it is at equal distance from previous prime (18306731) and next prime (18306733).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18306732.

It is not an unprimeable number, because it can be changed into a prime (18306731) 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 3 ways as a sum of consecutive naturals, for example, 762769 + ... + 762792.

Almost surely, 2^18306732 is an apocalyptic number.

18306732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18306732 is an abundant number, since it is smaller than the sum of its proper divisors (24409004).

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

18306732 is a wasteful number, since it uses less digits than its factorization.

18306732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525568 (or 1525566 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 18306732 is about 4278.6366987628. The cubic root of 18306732 is about 263.5544021224.

The spelling of 18306732 in words is "eighteen million, three hundred six thousand, seven hundred thirty-two".