18364764 has 72 divisors (see below), whose sum is σ = 49053312. Its totient is φ = 5302880.

The previous prime is 18364711. The next prime is 18364769. The reversal of 18364764 is 46746381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364769) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 69697 + ... + 69959.

It is an arithmetic number, because the mean of its divisors is an integer number (681296).

Almost surely, 2^18364764 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 18364764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24526656).

18364764 is an abundant number, since it is smaller than the sum of its proper divisors (30688548).

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

18364764 is a wasteful number, since it uses less digits than its factorization.

18364764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 302 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 18364764 is about 4285.4129322622. The cubic root of 18364764 is about 263.8325958906.

The spelling of 18364764 in words is "eighteen million, three hundred sixty-four thousand, seven hundred sixty-four".