100191820020 has 24 divisors (see below), whose sum is σ = 280537096224. Its totient is φ = 26717818656.

The previous prime is 100191819979. The next prime is 100191820031. The reversal of 100191820020 is 20028191001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834931774 + ... + 834931893.

It is an arithmetic number, because the mean of its divisors is an integer number (11689045676).

Almost surely, 2^100191820020 is an apocalyptic number.

100191820020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100191820020 is an abundant number, since it is smaller than the sum of its proper divisors (180345276204).

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

100191820020 is a wasteful number, since it uses less digits than its factorization.

100191820020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669863679 (or 1669863677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 100191820020 in words is "one hundred billion, one hundred ninety-one million, eight hundred twenty thousand, twenty".