18332772 has 12 divisors (see below), whose sum is σ = 42776496. Its totient is φ = 6110920.

The previous prime is 18332731. The next prime is 18332779. The reversal of 18332772 is 27723381.

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

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18332779) 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, 763854 + ... + 763877.

It is an arithmetic number, because the mean of its divisors is an integer number (3564708).

Almost surely, 2^18332772 is an apocalyptic number.

18332772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18332772 is an abundant number, since it is smaller than the sum of its proper divisors (24443724).

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

18332772 is a wasteful number, since it uses less digits than its factorization.

18332772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527738 (or 1527736 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 18332772 is about 4281.6786427755. The cubic root of 18332772 is about 263.6793052669.

The spelling of 18332772 in words is "eighteen million, three hundred thirty-two thousand, seven hundred seventy-two".