18316032 has 72 divisors (see below), whose sum is σ = 55727616. Its totient is φ = 5231616.

The previous prime is 18316031. The next prime is 18316061. The reversal of 18316032 is 23061381.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 18315993 and 18316011.

It is not an unprimeable number, because it can be changed into a prime (18316031) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3673 + ... + 7079.

Almost surely, 2^18316032 is an apocalyptic number.

18316032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18316032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27863808).

18316032 is an abundant number, since it is smaller than the sum of its proper divisors (37411584).

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

18316032 is an equidigital number, since it uses as much as digits as its factorization.

18316032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433 (or 3419 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 18316032 is about 4279.7233555453. The cubic root of 18316032 is about 263.5990239770.

The spelling of 18316032 in words is "eighteen million, three hundred sixteen thousand, thirty-two".