18085113 has 10 divisors (see below), whose sum is σ = 27016154. Its totient is φ = 12056688.

The previous prime is 18085103. The next prime is 18085117. The reversal of 18085113 is 31158081.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 419904 = 4203^2 + 648^2 .

It is not a de Polignac number, because 18085113 - 2¹⁰ = 18084089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18085117) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 111556 + ... + 111717.

Almost surely, 2^18085113 is an apocalyptic number.

It is an amenable number.

18085113 is a deficient number, since it is larger than the sum of its proper divisors (8931041).

18085113 is an equidigital number, since it uses as much as digits as its factorization.

18085113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223285 (or 223276 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 18085113 is about 4252.6595208175. The cubic root of 18085113 is about 262.4865625775.

The spelling of 18085113 in words is "eighteen million, eighty-five thousand, one hundred thirteen".