19493120900 has 72 divisors (see below), whose sum is σ = 46577081376. Its totient is φ = 7022118400.

The previous prime is 19493120887. The next prime is 19493120947. The reversal of 19493120900 is 902139491.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34892 + ... + 200508.

It is an arithmetic number, because the mean of its divisors is an integer number (646903908).

Almost surely, 2^19493120900 is an apocalyptic number.

19493120900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19493120900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23288540688).

19493120900 is an abundant number, since it is smaller than the sum of its proper divisors (27083960476).

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

19493120900 is a wasteful number, since it uses less digits than its factorization.

19493120900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165749 (or 165742 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 19493120900 in words is "nineteen billion, four hundred ninety-three million, one hundred twenty thousand, nine hundred".