18089712 has 60 divisors (see below), whose sum is σ = 50923080. Its totient is φ = 5994624.

The previous prime is 18089693. The next prime is 18089723. The reversal of 18089712 is 21798081.

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

It is a congruent number.

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, 38503 + ... + 38969.

It is an arithmetic number, because the mean of its divisors is an integer number (848718).

Almost surely, 2^18089712 is an apocalyptic number.

18089712 is a gapful number since it is divisible by the number (12) 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 18089712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25461540).

18089712 is an abundant number, since it is smaller than the sum of its proper divisors (32833368).

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

18089712 is a wasteful number, since it uses less digits than its factorization.

18089712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18089712 is about 4253.2002069030. The cubic root of 18089712 is about 262.5088105886.

The spelling of 18089712 in words is "eighteen million, eighty-nine thousand, seven hundred twelve".