18318565 has 16 divisors (see below), whose sum is σ = 23310720. Its totient is φ = 13780800.

The previous prime is 18318541. The next prime is 18318569. The reversal of 18318565 is 56581381.

It is not a de Polignac number, because 18318565 - 2⁷ = 18318437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13707 + ... + 14983.

It is an arithmetic number, because the mean of its divisors is an integer number (1456920).

Almost surely, 2^18318565 is an apocalyptic number.

It is an amenable number.

18318565 is a deficient number, since it is larger than the sum of its proper divisors (4992155).

18318565 is a wasteful number, since it uses less digits than its factorization.

18318565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its digits is 28800, while the sum is 37.

The square root of 18318565 is about 4280.0192756575. The cubic root of 18318565 is about 263.6111748175.

The spelling of 18318565 in words is "eighteen million, three hundred eighteen thousand, five hundred sixty-five".