100020191000 has 32 divisors (see below), whose sum is σ = 234047249280. Its totient is φ = 40008076000.

The previous prime is 100020190967. The next prime is 100020191083. The reversal of 100020191000 is 191020001.

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, 50009096 + ... + 50011095.

It is an arithmetic number, because the mean of its divisors is an integer number (7313976540).

Almost surely, 2^100020191000 is an apocalyptic number.

100020191000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020191000 is an abundant number, since it is smaller than the sum of its proper divisors (134027058280).

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

100020191000 is a wasteful number, since it uses less digits than its factorization.

100020191000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100020212 (or 100020198 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 100020191000 in words is "one hundred billion, twenty million, one hundred ninety-one thousand".