18368316 has 48 divisors (see below), whose sum is σ = 48535200. Its totient is φ = 6005376.

The previous prime is 18368291. The next prime is 18368321. The reversal of 18368316 is 61386381.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4120 + ... + 7328.

It is an arithmetic number, because the mean of its divisors is an integer number (1011150).

Almost surely, 2^18368316 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 18368316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24267600).

18368316 is an abundant number, since it is smaller than the sum of its proper divisors (30166884).

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

18368316 is a wasteful number, since it uses less digits than its factorization.

18368316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275 (or 3267 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18368316 is about 4285.8273413660. The cubic root of 18368316 is about 263.8496044215.

The spelling of 18368316 in words is "eighteen million, three hundred sixty-eight thousand, three hundred sixteen".