18180330 has 32 divisors (see below), whose sum is σ = 49866624. Its totient is φ = 4155456.

The previous prime is 18180313. The next prime is 18180347. The reversal of 18180330 is 3308181.

It is an interprime number because it is at equal distance from previous prime (18180313) and next prime (18180347).

It is a self number, because there is not a number n which added to its sum of digits gives 18180330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43077 + ... + 43496.

It is an arithmetic number, because the mean of its divisors is an integer number (1558332).

Almost surely, 2^18180330 is an apocalyptic number.

18180330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18180330 is an abundant number, since it is smaller than the sum of its proper divisors (31686294).

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

18180330 is a wasteful number, since it uses less digits than its factorization.

18180330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86590.

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

The square root of 18180330 is about 4263.8398187549. The cubic root of 18180330 is about 262.9464149868.

The spelling of 18180330 in words is "eighteen million, one hundred eighty thousand, three hundred thirty".