18058259 has 4 divisors (see below), whose sum is σ = 18162816. Its totient is φ = 17953704.

The previous prime is 18058231. The next prime is 18058279. The reversal of 18058259 is 95285081.

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

It is a cyclic number.

It is not a de Polignac number, because 18058259 - 2¹² = 18054163 is a prime.

It is a super-2 number, since 2×18058259² = 652201436222162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18058279) 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, 52019 + ... + 52364.

It is an arithmetic number, because the mean of its divisors is an integer number (4540704).

Almost surely, 2^18058259 is an apocalyptic number.

18058259 is a deficient number, since it is larger than the sum of its proper divisors (104557).

18058259 is a wasteful number, since it uses less digits than its factorization.

18058259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104556.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 18058259 is about 4249.5010295328. The cubic root of 18058259 is about 262.3565789479.

The spelling of 18058259 in words is "eighteen million, fifty-eight thousand, two hundred fifty-nine".