19863398912 has 160 divisors (see below), whose sum is σ = 48727536000. Its totient is φ = 8063483904.

The previous prime is 19863398839. The next prime is 19863398917. The reversal of 19863398912 is 21989336891.

It is not an unprimeable number, because it can be changed into a prime (19863398917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3333728 + ... + 3339680.

It is an arithmetic number, because the mean of its divisors is an integer number (304547100).

Almost surely, 2^19863398912 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 19863398912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24363768000).

19863398912 is an abundant number, since it is smaller than the sum of its proper divisors (28864137088).

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

19863398912 is an frugal number, since it uses more digits than its factorization.

19863398912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6011 (or 5981 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 59.

The spelling of 19863398912 in words is "nineteen billion, eight hundred sixty-three million, three hundred ninety-eight thousand, nine hundred twelve".