18059539 has 2 divisors, whose sum is σ = 18059540. Its totient is φ = 18059538.

The previous prime is 18059533. The next prime is 18059551. The reversal of 18059539 is 93595081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18059539 - 2⁷ = 18059411 is a prime.

It is a super-2 number, since 2×18059539² = 652293897785042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18059533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029769 + 9029770.

It is an arithmetic number, because the mean of its divisors is an integer number (9029770).

Almost surely, 2^18059539 is an apocalyptic number.

18059539 is a deficient number, since it is larger than the sum of its proper divisors (1).

18059539 is an equidigital number, since it uses as much as digits as its factorization.

18059539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 18059539 is about 4249.6516327812. The cubic root of 18059539 is about 262.3627775611.

The spelling of 18059539 in words is "eighteen million, fifty-nine thousand, five hundred thirty-nine".