18532 has 12 divisors (see below), whose sum is σ = 33516. Its totient is φ = 8960.

The previous prime is 18523. The next prime is 18539. The reversal of 18532 is 23581.

It is a happy number.

18532 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 576 + 17956 = 24^2 + 134^2 .

18532 is an undulating number in base 15.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18539) by changing a digit.

18532 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 108 + ... + 220.

It is an arithmetic number, because the mean of its divisors is an integer number (2793).

2¹⁸⁵³² is an apocalyptic number.

It is an amenable number.

18532 is a deficient number, since it is larger than the sum of its proper divisors (14984).

18532 is a wasteful number, since it uses less digits than its factorization.

18532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 156 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 18532 is about 136.1322886019. The cubic root of 18532 is about 26.4631027975.

The spelling of 18532 in words is "eighteen thousand, five hundred thirty-two".