20163993696 has 432 divisors, whose sum is σ = 72697008384. Its totient is φ = 5189184000.

The previous prime is 20163993623. The next prime is 20163993697. The reversal of 20163993696 is 69639936102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163993697) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 31955301 + ... + 31955931.

It is an arithmetic number, because the mean of its divisors is an integer number (168280112).

Almost surely, 2^20163993696 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 20163993696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36348504192).

20163993696 is an abundant number, since it is smaller than the sum of its proper divisors (52533014688).

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

20163993696 is a wasteful number, since it uses less digits than its factorization.

20163993696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 54.

The spelling of 20163993696 in words is "twenty billion, one hundred sixty-three million, nine hundred ninety-three thousand, six hundred ninety-six".