18259 has 6 divisors (see below), whose sum is σ = 19860. Its totient is φ = 16740.

The previous prime is 18257. The next prime is 18269. The reversal of 18259 is 95281.

18259 = T₁₀ + T₁₁ + ... + T₄₇.

18259 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 18259 - 2¹ = 18257 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 574 + ... + 604.

It is an arithmetic number, because the mean of its divisors is an integer number (3310).

2¹⁸²⁵⁹ is an apocalyptic number.

18259 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18259 is a deficient number, since it is larger than the sum of its proper divisors (1601).

18259 is an equidigital number, since it uses as much as digits as its factorization.

18259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 50 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 18259 is about 135.1258672498. The cubic root of 18259 is about 26.3325143508.

The spelling of 18259 in words is "eighteen thousand, two hundred fifty-nine".