18831085 has 16 divisors (see below), whose sum is σ = 27812736. Its totient is φ = 11919168.

The previous prime is 18831083. The next prime is 18831091. The reversal of 18831085 is 58013881.

It is a cyclic number.

It is not a de Polignac number, because 18831085 - 2¹ = 18831083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18831085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18831083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20239 + ... + 21148.

It is an arithmetic number, because the mean of its divisors is an integer number (1738296).

Almost surely, 2^18831085 is an apocalyptic number.

It is an amenable number.

18831085 is a deficient number, since it is larger than the sum of its proper divisors (8981651).

18831085 is a wasteful number, since it uses less digits than its factorization.

18831085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41412.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 18831085 is about 4339.4798075345. The cubic root of 18831085 is about 266.0470501128.

The spelling of 18831085 in words is "eighteen million, eight hundred thirty-one thousand, eighty-five".