18085275 has 72 divisors (see below), whose sum is σ = 36334480. Its totient is φ = 8864640.

The previous prime is 18085273. The next prime is 18085289. The reversal of 18085275 is 57258081.

It is not a de Polignac number, because 18085275 - 2¹ = 18085273 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085273) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78861 + ... + 79089.

Almost surely, 2^18085275 is an apocalyptic number.

18085275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18085275 is an abundant number, since it is smaller than the sum of its proper divisors (18249205).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18085275 is a wasteful number, since it uses less digits than its factorization.

18085275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 18085275 is about 4252.6785676794. The cubic root of 18085275 is about 262.4873463288.

The spelling of 18085275 in words is "eighteen million, eighty-five thousand, two hundred seventy-five".