18250330 has 32 divisors (see below), whose sum is σ = 38465280. Its totient is φ = 6103680.

The previous prime is 18250327. The next prime is 18250357. The reversal of 18250330 is 3305281.

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, 310 + ... + 6049.

It is an arithmetic number, because the mean of its divisors is an integer number (1202040).

Almost surely, 2^18250330 is an apocalyptic number.

18250330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18250330 is an abundant number, since it is smaller than the sum of its proper divisors (20214950).

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

18250330 is a wasteful number, since it uses less digits than its factorization.

18250330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 18250330 is about 4272.0404960627. The cubic root of 18250330 is about 263.2834583034.

The spelling of 18250330 in words is "eighteen million, two hundred fifty thousand, three hundred thirty".