18051330 has 64 divisors (see below), whose sum is σ = 49766400. Its totient is φ = 4144320.

The previous prime is 18051329. The next prime is 18051347. The reversal of 18051330 is 3315081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18051297 and 18051306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4831 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (777600).

Almost surely, 2^18051330 is an apocalyptic number.

18051330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18051330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24883200).

18051330 is an abundant number, since it is smaller than the sum of its proper divisors (31715070).

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

18051330 is a wasteful number, since it uses less digits than its factorization.

18051330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 18051330 is about 4248.6856791248. The cubic root of 18051330 is about 262.3230190259.

It can be divided in two parts, 18051 and 330, that added together give a palindrome (18381).

The spelling of 18051330 in words is "eighteen million, fifty-one thousand, three hundred thirty".