18316764 has 18 divisors (see below), whose sum is σ = 46300800. Its totient is φ = 6105576.

The previous prime is 18316757. The next prime is 18316783. The reversal of 18316764 is 46761381.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 508799 = 18316764 / (1 + 8 + 3 + 1 + 6 + 7 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254364 + ... + 254435.

Almost surely, 2^18316764 is an apocalyptic number.

It is an amenable number.

18316764 is an abundant number, since it is smaller than the sum of its proper divisors (27984036).

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

18316764 is a wasteful number, since it uses less digits than its factorization.

18316764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508809 (or 508804 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 18316764 is about 4279.8088742373. The cubic root of 18316764 is about 263.6025355075.

The spelling of 18316764 in words is "eighteen million, three hundred sixteen thousand, seven hundred sixty-four".