18089370 has 48 divisors (see below), whose sum is σ = 50653512. Its totient is φ = 4452480.

The previous prime is 18089333. The next prime is 18089371. The reversal of 18089370 is 7398081.

It can be written as a sum of positive squares in 4 ways, for example, as 8485569 + 9603801 = 2913^2 + 3099^2 .

It is not an unprimeable number, because it can be changed into a prime (18089371) 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, 6561 + ... + 8900.

Almost surely, 2^18089370 is an apocalyptic number.

18089370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18089370 is an abundant number, since it is smaller than the sum of its proper divisors (32564142).

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

18089370 is a wasteful number, since it uses less digits than its factorization.

18089370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15487 (or 15484 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18089370 is about 4253.1600016929. The cubic root of 18089370 is about 262.5071562675.

The spelling of 18089370 in words is "eighteen million, eighty-nine thousand, three hundred seventy".