18413312 has 36 divisors (see below), whose sum is σ = 38925936. Its totient is φ = 8663040.

The previous prime is 18413293. The next prime is 18413323. The reversal of 18413312 is 21331481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (1081276).

Almost surely, 2^18413312 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 18413312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19462968).

18413312 is an abundant number, since it is smaller than the sum of its proper divisors (20512624).

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

18413312 is an equidigital number, since it uses as much as digits as its factorization.

18413312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264 (or 4250 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 18413312 is about 4291.0735253547. The cubic root of 18413312 is about 264.0648753938.

Adding to 18413312 its reverse (21331481), we get a palindrome (39744793).

The spelling of 18413312 in words is "eighteen million, four hundred thirteen thousand, three hundred twelve".