18085331 has 12 divisors (see below), whose sum is σ = 20961960. Its totient is φ = 15471360.

The previous prime is 18085289. The next prime is 18085351. The reversal of 18085331 is 13358081.

It is a de Polignac number, because none of the positive numbers 2^k-18085331 is a prime.

It is a super-2 number, since 2×18085331² = 654158394759122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18085294 and 18085303.

It is not an unprimeable number, because it can be changed into a prime (18085351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (1746830).

Almost surely, 2^18085331 is an apocalyptic number.

18085331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18085331 is a deficient number, since it is larger than the sum of its proper divisors (2876629).

18085331 is a wasteful number, since it uses less digits than its factorization.

18085331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734 (or 5717 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18085331 is about 4252.6851517600. The cubic root of 18085331 is about 262.4876172541.

The spelling of 18085331 in words is "eighteen million, eighty-five thousand, three hundred thirty-one".