18033030 has 96 divisors (see below), whose sum is σ = 50083488. Its totient is φ = 4665600.

The previous prime is 18033017. The next prime is 18033047. The reversal of 18033030 is 3033081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 18032994 and 18033012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99540 + ... + 99720.

It is an arithmetic number, because the mean of its divisors is an integer number (521703).

Almost surely, 2^18033030 is an apocalyptic number.

18033030 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 18033030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25041744).

18033030 is an abundant number, since it is smaller than the sum of its proper divisors (32050458).

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

18033030 is a wasteful number, since it uses less digits than its factorization.

18033030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 18033030 is about 4246.5315258455. The cubic root of 18033030 is about 262.2343434846.

The spelling of 18033030 in words is "eighteen million, thirty-three thousand, thirty".