18012744 has 48 divisors (see below), whose sum is σ = 49287420. Its totient is φ = 5942400.

The previous prime is 18012737. The next prime is 18012763. The reversal of 18012744 is 44721081.

It can be written as a sum of positive squares in 2 ways, for example, as 16499844 + 1512900 = 4062^2 + 1230^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 6034 + ... + 8510.

Almost surely, 2^18012744 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 18012744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24643710).

18012744 is an abundant number, since it is smaller than the sum of its proper divisors (31274676).

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

18012744 is a wasteful number, since it uses less digits than its factorization.

18012744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 2583 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18012744 is about 4244.1423161812. The cubic root of 18012744 is about 262.1359743271.

The spelling of 18012744 in words is "eighteen million, twelve thousand, seven hundred forty-four".