18191020110200 has 48 divisors (see below), whose sum is σ = 48336139153680. Its totient is φ = 6236921180160.

The previous prime is 18191020110187. The next prime is 18191020110229. The reversal of 18191020110200 is 201102019181.

It is a self number, because there is not a number n which added to its sum of digits gives 18191020110200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6496791497 + ... + 6496794296.

It is an arithmetic number, because the mean of its divisors is an integer number (1007002899035).

Almost surely, 2^{18191020110200} is an apocalyptic number.

18191020110200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18191020110200 is an abundant number, since it is smaller than the sum of its proper divisors (30145119043480).

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

18191020110200 is a wasteful number, since it uses less digits than its factorization.

18191020110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12993585816 (or 12993585807 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 26.

Adding to 18191020110200 its reverse (201102019181), we get a palindrome (18392122129381).

The spelling of 18191020110200 in words is "eighteen trillion, one hundred ninety-one billion, twenty million, one hundred ten thousand, two hundred".