20935965168 has 120 divisors (see below), whose sum is σ = 59477170896. Its totient is φ = 6873984000.

The previous prime is 20935965161. The next prime is 20935965181. The reversal of 20935965168 is 86156953902.

It is a happy number.

20935965168 is a `hidden beast` number, since 2 + 0 + 9 + 35 + 96 + 516 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20935965161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2580318 + ... + 2588418.

Almost surely, 2^20935965168 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 20935965168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29738585448).

20935965168 is an abundant number, since it is smaller than the sum of its proper divisors (38541205728).

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

20935965168 is a wasteful number, since it uses less digits than its factorization.

20935965168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8383 (or 8374 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 20935965168 in words is "twenty billion, nine hundred thirty-five million, nine hundred sixty-five thousand, one hundred sixty-eight".