19785672296 has 48 divisors (see below), whose sum is σ = 40226153100. Its totient is φ = 9123241920.

The previous prime is 19785672271. The next prime is 19785672299. The reversal of 19785672296 is 69227658791.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 20124196 + 19765548100 = 4486^2 + 140590^2 .

It is not an unprimeable number, because it can be changed into a prime (19785672299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18647606 + ... + 18648666.

Almost surely, 2^19785672296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19785672296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20113076550).

19785672296 is an abundant number, since it is smaller than the sum of its proper divisors (20440480804).

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

19785672296 is an frugal number, since it uses more digits than its factorization.

19785672296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 1076 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 62.

The spelling of 19785672296 in words is "nineteen billion, seven hundred eighty-five million, six hundred seventy-two thousand, two hundred ninety-six".