18838330 has 32 divisors (see below), whose sum is σ = 38983680. Its totient is φ = 6420480.

The previous prime is 18838327. The next prime is 18838331. The reversal of 18838330 is 3383881.

It is not an unprimeable number, because it can be changed into a prime (18838331) 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, 12666 + ... + 14074.

It is an arithmetic number, because the mean of its divisors is an integer number (1218240).

Almost surely, 2^18838330 is an apocalyptic number.

18838330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18838330 is an abundant number, since it is smaller than the sum of its proper divisors (20145350).

18838330 is a wasteful number, since it uses less digits than its factorization.

18838330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 18838330 is about 4340.3145047335. The cubic root of 18838330 is about 266.0811650481.

The spelling of 18838330 in words is "eighteen million, eight hundred thirty-eight thousand, three hundred thirty".