19720716288 has 240 divisors, whose sum is σ = 64737106560. Its totient is φ = 5199888384.

The previous prime is 19720716259. The next prime is 19720716293. The reversal of 19720716288 is 88261702791.

It is a self number, because there is not a number n which added to its sum of digits gives 19720716288.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4470628 + ... + 4475036.

It is an arithmetic number, because the mean of its divisors is an integer number (269737944).

Almost surely, 2^19720716288 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 19720716288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32368553280).

19720716288 is an abundant number, since it is smaller than the sum of its proper divisors (45016390272).

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

19720716288 is an equidigital number, since it uses as much as digits as its factorization.

19720716288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460 (or 4434 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 19720716288 in words is "nineteen billion, seven hundred twenty million, seven hundred sixteen thousand, two hundred eighty-eight".