19403116668 has 216 divisors, whose sum is σ = 57494346000. Its totient is φ = 5480386560.

The previous prime is 19403116639. The next prime is 19403116679. The reversal of 19403116668 is 86661130491.

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 71 ways as a sum of consecutive naturals, for example, 5543583 + ... + 5547081.

Almost surely, 2^19403116668 is an apocalyptic number.

19403116668 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 19403116668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28747173000).

19403116668 is an abundant number, since it is smaller than the sum of its proper divisors (38091229332).

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

19403116668 is a wasteful number, since it uses less digits than its factorization.

19403116668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597 (or 3575 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 19403116668 in words is "nineteen billion, four hundred three million, one hundred sixteen thousand, six hundred sixty-eight".