18081200 has 60 divisors (see below), whose sum is σ = 46012680. Its totient is φ = 6804480.

The previous prime is 18081187. The next prime is 18081209. The reversal of 18081200 is 218081.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (18081209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5471 + ... + 8129.

It is an arithmetic number, because the mean of its divisors is an integer number (766878).

Almost surely, 2^18081200 is an apocalyptic number.

18081200 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 18081200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23006340).

18081200 is an abundant number, since it is smaller than the sum of its proper divisors (27931480).

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

18081200 is a wasteful number, since it uses less digits than its factorization.

18081200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694 (or 2683 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18081200 is about 4252.1994308828. The cubic root of 18081200 is about 262.4676301733.

Adding to 18081200 its reverse (218081), we get a palindrome (18299281).

It can be divided in two parts, 18081 and 200, that added together give a palindrome (18281).

The spelling of 18081200 in words is "eighteen million, eighty-one thousand, two hundred".