18330880 has 36 divisors (see below), whose sum is σ = 43911252. Its totient is φ = 7331840.

The previous prime is 18330859. The next prime is 18330881. The reversal of 18330880 is 8803381.

It can be written as a sum of positive squares in 2 ways, for example, as 2458624 + 15872256 = 1568^2 + 3984^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18330881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5881 + ... + 8440.

It is an arithmetic number, because the mean of its divisors is an integer number (1219757).

Almost surely, 2^18330880 is an apocalyptic number.

18330880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18330880 is an abundant number, since it is smaller than the sum of its proper divisors (25580372).

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

18330880 is an equidigital number, since it uses as much as digits as its factorization.

18330880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14342 (or 14328 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18330880 is about 4281.4576956920. The cubic root of 18330880 is about 263.6702341090.

The spelling of 18330880 in words is "eighteen million, three hundred thirty thousand, eight hundred eighty".