18108330 has 32 divisors (see below), whose sum is σ = 45748800. Its totient is φ = 4574592.

The previous prime is 18108323. The next prime is 18108331. The reversal of 18108330 is 3380181.

It is a self number, because there is not a number n which added to its sum of digits gives 18108330.

It is not an unprimeable number, because it can be changed into a prime (18108331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15315 + ... + 16454.

It is an arithmetic number, because the mean of its divisors is an integer number (1429650).

Almost surely, 2^18108330 is an apocalyptic number.

18108330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18108330 is an abundant number, since it is smaller than the sum of its proper divisors (27640470).

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

18108330 is a wasteful number, since it uses less digits than its factorization.

18108330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31798.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 18108330 is about 4255.3883489054. The cubic root of 18108330 is about 262.5988380637.

The spelling of 18108330 in words is "eighteen million, one hundred eight thousand, three hundred thirty".