19101900100 has 36 divisors (see below), whose sum is σ = 41457149524. Its totient is φ = 7639649280.

The previous prime is 19101900079. The next prime is 19101900113. The reversal of 19101900100 is 100910191.

It can be written as a sum of positive squares in 6 ways, for example, as 3189086784 + 15912813316 = 56472^2 + 126146^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1247692 + ... + 1262908.

Almost surely, 2^19101900100 is an apocalyptic number.

19101900100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19101900100 is an abundant number, since it is smaller than the sum of its proper divisors (22355249424).

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

19101900100 is a wasteful number, since it uses less digits than its factorization.

19101900100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27784 (or 27777 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 22.

The spelling of 19101900100 in words is "nineteen billion, one hundred one million, nine hundred thousand, one hundred".