18540330 has 32 divisors (see below), whose sum is σ = 45702144. Its totient is φ = 4810176.

The previous prime is 18540329. The next prime is 18540341. The reversal of 18540330 is 3304581.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18540330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7242 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (1428192).

Almost surely, 2^18540330 is an apocalyptic number.

18540330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18540330 is an abundant number, since it is smaller than the sum of its proper divisors (27161814).

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

18540330 is a wasteful number, since it uses less digits than its factorization.

18540330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16750.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 18540330 is about 4305.8483484675. The cubic root of 18540330 is about 264.6706719470.

The spelling of 18540330 in words is "eighteen million, five hundred forty thousand, three hundred thirty".