18085263 has 24 divisors (see below), whose sum is σ = 29704752. Its totient is φ = 9725184.

The previous prime is 18085259. The next prime is 18085273. The reversal of 18085263 is 36258081.

It is a happy number.

It is not a de Polignac number, because 18085263 - 2² = 18085259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1120 + ... + 6117.

It is an arithmetic number, because the mean of its divisors is an integer number (1237698).

Almost surely, 2^18085263 is an apocalyptic number.

18085263 is a deficient number, since it is larger than the sum of its proper divisors (11619489).

18085263 is a wasteful number, since it uses less digits than its factorization.

18085263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7271 (or 7264 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18085263 is about 4252.6771568037. The cubic root of 18085263 is about 262.4872882733.

The spelling of 18085263 in words is "eighteen million, eighty-five thousand, two hundred sixty-three".