18086744 has 32 divisors (see below), whose sum is σ = 37133040. Its totient is φ = 8208000.

The previous prime is 18086743. The next prime is 18086771. The reversal of 18086744 is 44768081.

It is a junction number, because it is equal to n+sod(n) for n = 18086698 and 18086707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18086743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4919 + ... + 7769.

Almost surely, 2^18086744 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 18086744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18566520).

18086744 is an abundant number, since it is smaller than the sum of its proper divisors (19046296).

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

18086744 is a wasteful number, since it uses less digits than its factorization.

18086744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931 (or 2927 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 18086744 is about 4252.8512788481. The cubic root of 18086744 is about 262.4944530952.

The spelling of 18086744 in words is "eighteen million, eighty-six thousand, seven hundred forty-four".