18330990 has 16 divisors (see below), whose sum is σ = 43994448. Its totient is φ = 4888256.

The previous prime is 18330979. The next prime is 18331003. The reversal of 18330990 is 9903381.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305487 + ... + 305546.

It is an arithmetic number, because the mean of its divisors is an integer number (2749653).

Almost surely, 2^18330990 is an apocalyptic number.

18330990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18330990 is an abundant number, since it is smaller than the sum of its proper divisors (25663458).

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

18330990 is a wasteful number, since it uses less digits than its factorization.

18330990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611043.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 18330990 is about 4281.4705417648. The cubic root of 18330990 is about 263.6707615190.

The spelling of 18330990 in words is "eighteen million, three hundred thirty thousand, nine hundred ninety".