100009091900 has 18 divisors (see below), whose sum is σ = 217019729640. Its totient is φ = 40003636720.

The previous prime is 100009091887. The next prime is 100009091927. The reversal of 100009091900 is 9190900001.

It is a super-2 number, since 2×100009091900² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500045360 + ... + 500045559.

Almost surely, 2^100009091900 is an apocalyptic number.

100009091900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100009091900 is an abundant number, since it is smaller than the sum of its proper divisors (117010637740).

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

100009091900 is a wasteful number, since it uses less digits than its factorization.

100009091900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000090933 (or 1000090926 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 29.

Adding to 100009091900 its reverse (9190900001), we get a palindrome (109199991901).

The spelling of 100009091900 in words is "one hundred billion, nine million, ninety-one thousand, nine hundred".