18089085 has 24 divisors (see below), whose sum is σ = 33669216. Its totient is φ = 8268960.

The previous prime is 18089081. The next prime is 18089117. The reversal of 18089085 is 58098081.

It is not a de Polignac number, because 18089085 - 2² = 18089081 is a prime.

It is a super-2 number, since 2×18089085² = 654429992274450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18089081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11571 + ... + 13040.

It is an arithmetic number, because the mean of its divisors is an integer number (1402884).

Almost surely, 2^18089085 is an apocalyptic number.

18089085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18089085 is a deficient number, since it is larger than the sum of its proper divisors (15580131).

18089085 is a wasteful number, since it uses less digits than its factorization.

18089085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24633 (or 24626 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 18089085 is about 4253.1264970607. The cubic root of 18089085 is about 262.5057776506.

The spelling of 18089085 in words is "eighteen million, eighty-nine thousand, eighty-five".