191929202020 has 48 divisors (see below), whose sum is σ = 430748720640. Its totient is φ = 71580399104.

The previous prime is 191929201991. The next prime is 191929202083. The reversal of 191929202020 is 20202929191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2601460 + ... + 2674219.

It is an arithmetic number, because the mean of its divisors is an integer number (8973931680).

Almost surely, 2^191929202020 is an apocalyptic number.

191929202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191929202020 is an abundant number, since it is smaller than the sum of its proper divisors (238819518620).

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

191929202020 is a wasteful number, since it uses less digits than its factorization.

191929202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275812 (or 5275810 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 191929202020 in words is "one hundred ninety-one billion, nine hundred twenty-nine million, two hundred two thousand, twenty".