18033536 has 32 divisors (see below), whose sum is σ = 36352800. Its totient is φ = 8909824.

The previous prime is 18033529. The next prime is 18033539. The reversal of 18033536 is 63533081.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 18033499 and 18033508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18033539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10601 + ... + 12183.

It is an arithmetic number, because the mean of its divisors is an integer number (1136025).

Almost surely, 2^18033536 is an apocalyptic number.

18033536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18033536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18176400).

18033536 is an abundant number, since it is smaller than the sum of its proper divisors (18319264).

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

18033536 is an equidigital number, since it uses as much as digits as its factorization.

18033536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 18033536 is about 4246.5911034617. The cubic root of 18033536 is about 262.2367961938.

The spelling of 18033536 in words is "eighteen million, thirty-three thousand, five hundred thirty-six".