18059 has 2 divisors, whose sum is σ = 18060. Its totient is φ = 18058.

The previous prime is 18049. The next prime is 18061. The reversal of 18059 is 95081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18059 - 2⁴ = 18043 is a prime.

It is a super-2 number, since 2×18059² = 652254962, which contains 22 as substring.

Together with 18061, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (18049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029 + 9030.

It is an arithmetic number, because the mean of its divisors is an integer number (9030).

2¹⁸⁰⁵⁹ is an apocalyptic number.

18059 is a deficient number, since it is larger than the sum of its proper divisors (1).

18059 is an equidigital number, since it uses as much as digits as its factorization.

18059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 18059 is about 134.3837787830. The cubic root of 18059 is about 26.2360167400.

The spelling of 18059 in words is "eighteen thousand, fifty-nine".