18089892 has 72 divisors (see below), whose sum is σ = 48799296. Its totient is φ = 5855328.

The previous prime is 18089867. The next prime is 18089893. The reversal of 18089892 is 29898081.

It is not an unprimeable number, because it can be changed into a prime (18089893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35713 + ... + 36215.

It is an arithmetic number, because the mean of its divisors is an integer number (677768).

Almost surely, 2^18089892 is an apocalyptic number.

18089892 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 18089892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24399648).

18089892 is an abundant number, since it is smaller than the sum of its proper divisors (30709404).

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

18089892 is a wasteful number, since it uses less digits than its factorization.

18089892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 18089892 is about 4253.2213673873. The cubic root of 18089892 is about 262.5096812756.

It can be divided in two parts, 18089 and 892, that added together give a palindrome (18981).

The spelling of 18089892 in words is "eighteen million, eighty-nine thousand, eight hundred ninety-two".