18312832 has 32 divisors (see below), whose sum is σ = 36964800. Its totient is φ = 9035520.

The previous prime is 18312821. The next prime is 18312841. The reversal of 18312832 is 23821381.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 18312832.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9207 + ... + 11017.

It is an arithmetic number, because the mean of its divisors is an integer number (1155150).

Almost surely, 2^18312832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18312832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18482400).

18312832 is an abundant number, since it is smaller than the sum of its proper divisors (18651968).

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

18312832 is an equidigital number, since it uses as much as digits as its factorization.

18312832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904 (or 1892 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 18312832 is about 4279.3494832743. The cubic root of 18312832 is about 263.5836719254.

The spelling of 18312832 in words is "eighteen million, three hundred twelve thousand, eight hundred thirty-two".