18059913 has 6 divisors (see below), whose sum is σ = 26086554. Its totient is φ = 12039936.

The previous prime is 18059903. The next prime is 18059929. The reversal of 18059913 is 31995081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 1192464 = 4107^2 + 1092^2 .

It is not a de Polignac number, because 18059913 - 2⁴ = 18059897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18059903) 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, 1003320 + ... + 1003337.

It is an arithmetic number, because the mean of its divisors is an integer number (4347759).

Almost surely, 2^18059913 is an apocalyptic number.

It is an amenable number.

18059913 is a deficient number, since it is larger than the sum of its proper divisors (8026641).

18059913 is a wasteful number, since it uses less digits than its factorization.

18059913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006663 (or 2006660 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 18059913 is about 4249.6956361603. The cubic root of 18059913 is about 262.3645886631.

The spelling of 18059913 in words is "eighteen million, fifty-nine thousand, nine hundred thirteen".