18089660 has 12 divisors (see below), whose sum is σ = 37988328. Its totient is φ = 7235856.

The previous prime is 18089623. The next prime is 18089677. The reversal of 18089660 is 6698081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452222 + ... + 452261.

It is an arithmetic number, because the mean of its divisors is an integer number (3165694).

Almost surely, 2^18089660 is an apocalyptic number.

18089660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18089660 is an abundant number, since it is smaller than the sum of its proper divisors (19898668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18089660 is a wasteful number, since it uses less digits than its factorization.

18089660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904492 (or 904490 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 18089660 is about 4253.1940938546. The cubic root of 18089660 is about 262.5085590558.

The spelling of 18089660 in words is "eighteen million, eighty-nine thousand, six hundred sixty".