191531133020 has 12 divisors (see below), whose sum is σ = 402215379384. Its totient is φ = 76612453200.

The previous prime is 191531132999. The next prime is 191531133047. The reversal of 191531133020 is 20331135191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4788278306 + ... + 4788278345.

It is an arithmetic number, because the mean of its divisors is an integer number (33517948282).

Almost surely, 2^191531133020 is an apocalyptic number.

191531133020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191531133020 is an abundant number, since it is smaller than the sum of its proper divisors (210684246364).

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

191531133020 is a wasteful number, since it uses less digits than its factorization.

191531133020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9576556660 (or 9576556658 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The spelling of 191531133020 in words is "one hundred ninety-one billion, five hundred thirty-one million, one hundred thirty-three thousand, twenty".