18618764 has 12 divisors (see below), whose sum is σ = 33069624. Its totient is φ = 9170304.

The previous prime is 18618763. The next prime is 18618781. The reversal of 18618764 is 46781681.

It is not an unprimeable number, because it can be changed into a prime (18618763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34469 + ... + 35004.

It is an arithmetic number, because the mean of its divisors is an integer number (2755802).

Almost surely, 2^18618764 is an apocalyptic number.

It is an amenable number.

18618764 is a deficient number, since it is larger than the sum of its proper divisors (14450860).

18618764 is a wasteful number, since it uses less digits than its factorization.

18618764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69544 (or 69542 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 18618764 is about 4314.9465813611. The cubic root of 18618764 is about 265.0433725140.

The spelling of 18618764 in words is "eighteen million, six hundred eighteen thousand, seven hundred sixty-four".