18819163900 has 18 divisors (see below), whose sum is σ = 40837585880. Its totient is φ = 7527665520.

The previous prime is 18819163879. The next prime is 18819163927. The reversal of 18819163900 is 936191881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94095720 + ... + 94095919.

Almost surely, 2^18819163900 is an apocalyptic number.

18819163900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18819163900 is an abundant number, since it is smaller than the sum of its proper divisors (22018421980).

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

18819163900 is a wasteful number, since it uses less digits than its factorization.

18819163900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188191653 (or 188191646 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 18819163900 in words is "eighteen billion, eight hundred nineteen million, one hundred sixty-three thousand, nine hundred".