18027800 has 96 divisors (see below), whose sum is σ = 48806400. Its totient is φ = 6065280.

The previous prime is 18027767. The next prime is 18027829. The reversal of 18027800 is 872081.

It is a self number, because there is not a number n which added to its sum of digits gives 18027800.

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, 110519 + ... + 110681.

It is an arithmetic number, because the mean of its divisors is an integer number (508400).

Almost surely, 2^18027800 is an apocalyptic number.

18027800 is a gapful number since it is divisible by the number (10) 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 18027800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24403200).

18027800 is an abundant number, since it is smaller than the sum of its proper divisors (30778600).

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

18027800 is a wasteful number, since it uses less digits than its factorization.

18027800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 18027800 is about 4245.9156845138. The cubic root of 18027800 is about 262.2089896713.

Adding to 18027800 its reverse (872081), we get a palindrome (18899881).

The spelling of 18027800 in words is "eighteen million, twenty-seven thousand, eight hundred".