19609747872 has 576 divisors, whose sum is σ = 64865525760. Its totient is φ = 5144832000.

The previous prime is 19609747849. The next prime is 19609747889. The reversal of 19609747872 is 27874790691.

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 95 ways as a sum of consecutive naturals, for example, 276193597 + ... + 276193667.

It is an arithmetic number, because the mean of its divisors is an integer number (112613760).

Almost surely, 2^19609747872 is an apocalyptic number.

19609747872 is a gapful number since it is divisible by the number (12) 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 19609747872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32432762880).

19609747872 is an abundant number, since it is smaller than the sum of its proper divisors (45255777888).

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

19609747872 is a wasteful number, since it uses less digits than its factorization.

19609747872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 19609747872 in words is "nineteen billion, six hundred nine million, seven hundred forty-seven thousand, eight hundred seventy-two".