18594 has 12 divisors (see below), whose sum is σ = 40326. Its totient is φ = 6192.

The previous prime is 18593. The next prime is 18617. The reversal of 18594 is 49581.

It can be written as a sum of positive squares in only one way, i.e., 11025 + 7569 = 105^2 + 87^2 .

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (18593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 499 + ... + 534.

18594 is a Friedman number, since it can be written as 18*(9+4^5), using all its digits and the basic arithmetic operations.

2¹⁸⁵⁹⁴ is an apocalyptic number.

18594 is an abundant number, since it is smaller than the sum of its proper divisors (21732).

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

18594 is a wasteful number, since it uses less digits than its factorization.

18594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1038 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 18594 is about 136.3598181284. The cubic root of 18594 is about 26.4925812863.

The spelling of 18594 in words is "eighteen thousand, five hundred ninety-four".