199809841248020 has 96 divisors (see below), whose sum is σ = 440875286691840. Its totient is φ = 75997029709440.

The previous prime is 199809841248019. The next prime is 199809841248037. The reversal of 199809841248020 is 20842148908991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13889876 + ... + 24342315.

It is an arithmetic number, because the mean of its divisors is an integer number (4592450903040).

Almost surely, 2^{199809841248020} is an apocalyptic number.

199809841248020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199809841248020 is an abundant number, since it is smaller than the sum of its proper divisors (241065445443820).

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

199809841248020 is a wasteful number, since it uses less digits than its factorization.

199809841248020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38232405 (or 38232403 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 65.

The spelling of 199809841248020 in words is "one hundred ninety-nine trillion, eight hundred nine billion, eight hundred forty-one million, two hundred forty-eight thousand, twenty".