18201120200 has 24 divisors (see below), whose sum is σ = 42317604930. Its totient is φ = 7280448000.

The previous prime is 18201120187. The next prime is 18201120251. The reversal of 18201120200 is 202110281.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6866111044 + 11335009156 = 82862^2 + 106466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45502601 + ... + 45503000.

Almost surely, 2^18201120200 is an apocalyptic number.

18201120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18201120200 is an abundant number, since it is smaller than the sum of its proper divisors (24116484730).

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

18201120200 is a wasteful number, since it uses less digits than its factorization.

18201120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91005617 (or 91005608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 18201120200 its reverse (202110281), we get a palindrome (18403230481).

The spelling of 18201120200 in words is "eighteen billion, two hundred one million, one hundred twenty thousand, two hundred".