18099360 has 72 divisors (see below), whose sum is σ = 61768980. Its totient is φ = 4826112.

The previous prime is 18099331. The next prime is 18099379. The reversal of 18099360 is 6399081.

It can be written as a sum of positive squares in 2 ways, for example, as 16744464 + 1354896 = 4092^2 + 1164^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4845 + ... + 7724.

Almost surely, 2^18099360 is an apocalyptic number.

18099360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18099360 is an abundant number, since it is smaller than the sum of its proper divisors (43669620).

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

18099360 is a wasteful number, since it uses less digits than its factorization.

18099360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12590 (or 12579 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 18099360 is about 4254.3342604925. The cubic root of 18099360 is about 262.5554712702. Note that the first 3 decimals are identical.

The spelling of 18099360 in words is "eighteen million, ninety-nine thousand, three hundred sixty".