18033396 has 48 divisors (see below), whose sum is σ = 45017280. Its totient is φ = 5598720.

The previous prime is 18033391. The next prime is 18033401. The reversal of 18033396 is 69333081.

It is an interprime number because it is at equal distance from previous prime (18033391) and next prime (18033401).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18033391) 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, 21831 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (937860).

Almost surely, 2^18033396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18033396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22508640).

18033396 is an abundant number, since it is smaller than the sum of its proper divisors (26983884).

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

18033396 is a wasteful number, since it uses less digits than its factorization.

18033396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 18033396 is about 4246.5746196199. The cubic root of 18033396 is about 262.2361175832.

The spelling of 18033396 in words is "eighteen million, thirty-three thousand, three hundred ninety-six".