18985085 has 16 divisors (see below), whose sum is σ = 27408000. Its totient is φ = 12332736.

The previous prime is 18985081. The next prime is 18985093. The reversal of 18985085 is 58058981.

18985085 = 190² + 191² + ... + 399².

It is a cyclic number.

It is not a de Polignac number, because 18985085 - 2² = 18985081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18985081) 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, 13610 + ... + 14939.

It is an arithmetic number, because the mean of its divisors is an integer number (1713000).

Almost surely, 2^18985085 is an apocalyptic number.

It is an amenable number.

18985085 is a deficient number, since it is larger than the sum of its proper divisors (8422915).

18985085 is a wasteful number, since it uses less digits than its factorization.

18985085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28580.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 18985085 is about 4357.1877398157. The cubic root of 18985085 is about 266.7703234173.

The spelling of 18985085 in words is "eighteen million, nine hundred eighty-five thousand, eighty-five".