18085705 has 48 divisors (see below), whose sum is σ = 27091584. Its totient is φ = 11432960.

The previous prime is 18085699. The next prime is 18085709. The reversal of 18085705 is 50758081.

It is not a de Polignac number, because 18085705 - 2⁵ = 18085673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18085709) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 623631 + ... + 623659.

It is an arithmetic number, because the mean of its divisors is an integer number (564408).

Almost surely, 2^18085705 is an apocalyptic number.

It is an amenable number.

18085705 is a deficient number, since it is larger than the sum of its proper divisors (9005879).

18085705 is a wasteful number, since it uses less digits than its factorization.

18085705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 18085705 is about 4252.7291237510. The cubic root of 18085705 is about 262.4894266338.

The spelling of 18085705 in words is "eighteen million, eighty-five thousand, seven hundred five".