18764 has 6 divisors (see below), whose sum is σ = 32844. Its totient is φ = 9380.

The previous prime is 18757. The next prime is 18773. The reversal of 18764 is 46781.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2342 + ... + 2349.

It is an arithmetic number, because the mean of its divisors is an integer number (5474).

2¹⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

18764 is a deficient number, since it is larger than the sum of its proper divisors (14080).

18764 is a wasteful number, since it uses less digits than its factorization.

18764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695 (or 4693 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 18764 is about 136.9817506093. The cubic root of 18764 is about 26.5730746823.

The spelling of 18764 in words is "eighteen thousand, seven hundred sixty-four".