19688691168 has 192 divisors, whose sum is σ = 60994321920. Its totient is φ = 6157449216.

The previous prime is 19688691103. The next prime is 19688691199. The reversal of 19688691168 is 86119688691.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5094805 + ... + 5098667.

It is an arithmetic number, because the mean of its divisors is an integer number (317678760).

Almost surely, 2^19688691168 is an apocalyptic number.

19688691168 is a gapful number since it is divisible by the number (18) 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 19688691168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30497160960).

19688691168 is an abundant number, since it is smaller than the sum of its proper divisors (41305630752).

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

19688691168 is a wasteful number, since it uses less digits than its factorization.

19688691168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4232 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 63.

The spelling of 19688691168 in words is "nineteen billion, six hundred eighty-eight million, six hundred ninety-one thousand, one hundred sixty-eight".