18202019191900 has 72 divisors (see below), whose sum is σ = 41710934079360. Its totient is φ = 6875428248000.

The previous prime is 18202019191849. The next prime is 18202019191931. The reversal of 18202019191900 is 919191020281.

It is a happy number.

18202019191900 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×18202019191900² (a number of 27 digits) contains 22 as substring.

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, 14811046 + ... + 15992845.

It is an arithmetic number, because the mean of its divisors is an integer number (579318528880).

Almost surely, 2^{18202019191900} is an apocalyptic number.

18202019191900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18202019191900 is an abundant number, since it is smaller than the sum of its proper divisors (23508914887460).

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

18202019191900 is a wasteful number, since it uses less digits than its factorization.

18202019191900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30804235 (or 30804228 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 18202019191900 in words is "eighteen trillion, two hundred two billion, nineteen million, one hundred ninety-one thousand, nine hundred".