18036744 has 48 divisors (see below), whose sum is σ = 49571760. Its totient is φ = 5464800.

The previous prime is 18036709. The next prime is 18036751. The reversal of 18036744 is 44763081.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202 + ... + 6009.

It is an arithmetic number, because the mean of its divisors is an integer number (1032745).

Almost surely, 2^18036744 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 18036744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24785880).

18036744 is an abundant number, since it is smaller than the sum of its proper divisors (31535016).

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

18036744 is a wasteful number, since it uses less digits than its factorization.

18036744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242 (or 6227 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 18036744 is about 4246.9688013924. The cubic root of 18036744 is about 262.2523451090.

The spelling of 18036744 in words is "eighteen million, thirty-six thousand, seven hundred forty-four".