19696989312 has 1536 divisors, whose sum is σ = 85542912000. Its totient is φ = 4180377600.

The previous prime is 19696989289. The next prime is 19696989349. The reversal of 19696989312 is 21398969691.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 19696989312.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 635386737 + ... + 635386767.

It is an arithmetic number, because the mean of its divisors is an integer number (55692000).

Almost surely, 2^19696989312 is an apocalyptic number.

19696989312 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 19696989312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42771456000).

19696989312 is an abundant number, since it is smaller than the sum of its proper divisors (65845922688).

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

19696989312 is a wasteful number, since it uses less digits than its factorization.

19696989312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 115 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The spelling of 19696989312 in words is "nineteen billion, six hundred ninety-six million, nine hundred eighty-nine thousand, three hundred twelve".