18359 has 4 divisors (see below), whose sum is σ = 20040. Its totient is φ = 16680.

The previous prime is 18353. The next prime is 18367. The reversal of 18359 is 95381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18359 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18353) 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, 824 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (5010).

2¹⁸³⁵⁹ is an apocalyptic number.

18359 is a deficient number, since it is larger than the sum of its proper divisors (1681).

18359 is a wasteful number, since it uses less digits than its factorization.

18359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680.

The product of its digits is 1080, while the sum is 26.

The square root of 18359 is about 135.4953873754. The cubic root of 18359 is about 26.3804990668.

It can be divided in two parts, 183 and 59, that added together give a palindrome (242).

The spelling of 18359 in words is "eighteen thousand, three hundred fifty-nine".