18033330 has 64 divisors (see below), whose sum is σ = 50135040. Its totient is φ = 4065984.

The previous prime is 18033313. The next prime is 18033377. The reversal of 18033330 is 3333081.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18033297 and 18033306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16047 + ... + 17133.

It is an arithmetic number, because the mean of its divisors is an integer number (783360).

Almost surely, 2^18033330 is an apocalyptic number.

18033330 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 18033330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25067520).

18033330 is an abundant number, since it is smaller than the sum of its proper divisors (32101710).

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

18033330 is a wasteful number, since it uses less digits than its factorization.

18033330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 18033330 is about 4246.5668486437. The cubic root of 18033330 is about 262.2357976656.

The spelling of 18033330 in words is "eighteen million, thirty-three thousand, three hundred thirty".