18000200 has 24 divisors (see below), whose sum is σ = 41850930. Its totient is φ = 7200000.

The previous prime is 18000149. The next prime is 18000209. The reversal of 18000200 is 200081.

It can be written as a sum of positive squares in 3 ways, for example, as 17623204 + 376996 = 4198^2 + 614^2 .

It is not an unprimeable number, because it can be changed into a prime (18000209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44801 + ... + 45200.

Almost surely, 2^18000200 is an apocalyptic number.

18000200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18000200 is an abundant number, since it is smaller than the sum of its proper divisors (23850730).

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

18000200 is a wasteful number, since it uses less digits than its factorization.

18000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90017 (or 90008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 18000200 is about 4242.6642572799. The cubic root of 18000200 is about 262.0751100623.

Adding to 18000200 its reverse (200081), we get a palindrome (18200281).

The spelling of 18000200 in words is "eighteen million, two hundred", and thus it is an aban number.