18066744 has 48 divisors (see below), whose sum is σ = 49771800. Its totient is φ = 5918784.

The previous prime is 18066743. The next prime is 18066749. The reversal of 18066744 is 44766081.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18066699 and 18066708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2122 + ... + 6374.

Almost surely, 2^18066744 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 18066744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24885900).

18066744 is an abundant number, since it is smaller than the sum of its proper divisors (31705056).

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

18066744 is a wasteful number, since it uses less digits than its factorization.

18066744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324 (or 4317 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 18066744 is about 4250.4992647923. The cubic root of 18066744 is about 262.3976635103.

The spelling of 18066744 in words is "eighteen million, sixty-six thousand, seven hundred forty-four".