18097872 has 120 divisors (see below), whose sum is σ = 53371584. Its totient is φ = 5271552.

The previous prime is 18097817. The next prime is 18097889. The reversal of 18097872 is 27879081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186528 + ... + 186624.

Almost surely, 2^18097872 is an apocalyptic number.

18097872 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 18097872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26685792).

18097872 is an abundant number, since it is smaller than the sum of its proper divisors (35273712).

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

18097872 is a wasteful number, since it uses less digits than its factorization.

18097872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 18097872 is about 4254.1593764221. The cubic root of 18097872 is about 262.5482759284.

The spelling of 18097872 in words is "eighteen million, ninety-seven thousand, eight hundred seventy-two".