19875900900 has 36 divisors (see below), whose sum is σ = 57507607472. Its totient is φ = 5300240160.

The previous prime is 19875900899. The next prime is 19875900937. The reversal of 19875900900 is 900957891.

It is a self number, because there is not a number n which added to its sum of digits gives 19875900900.

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, 33126202 + ... + 33126801.

Almost surely, 2^19875900900 is an apocalyptic number.

19875900900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19875900900 is an abundant number, since it is smaller than the sum of its proper divisors (37631706572).

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

19875900900 is a wasteful number, since it uses less digits than its factorization.

19875900900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66253020 (or 66253013 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 48.

The spelling of 19875900900 in words is "nineteen billion, eight hundred seventy-five million, nine hundred thousand, nine hundred".