18315712 has 28 divisors (see below), whose sum is σ = 37124640. Its totient is φ = 8961536.

The previous prime is 18315697. The next prime is 18315727. The reversal of 18315712 is 21751381.

It is an interprime number because it is at equal distance from previous prime (18315697) and next prime (18315727).

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, 37 + ... + 6052.

It is an arithmetic number, because the mean of its divisors is an integer number (1325880).

Almost surely, 2^18315712 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 18315712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18562320).

18315712 is an abundant number, since it is smaller than the sum of its proper divisors (18808928).

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

18315712 is an equidigital number, since it uses as much as digits as its factorization.

18315712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148 (or 6138 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 18315712 is about 4279.6859697880. The cubic root of 18315712 is about 263.5974888523.

The spelling of 18315712 in words is "eighteen million, three hundred fifteen thousand, seven hundred twelve".