21707005968 has 200 divisors, whose sum is σ = 66869827200. Its totient is φ = 6774451200.

The previous prime is 21707005961. The next prime is 21707006051. The reversal of 21707005968 is 86950070712.

It is not an unprimeable number, because it can be changed into a prime (21707005961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4381893 + ... + 4386843.

It is an arithmetic number, because the mean of its divisors is an integer number (334349136).

Almost surely, 2^21707005968 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 21707005968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33434913600).

21707005968 is an abundant number, since it is smaller than the sum of its proper divisors (45162821232).

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

21707005968 is a wasteful number, since it uses less digits than its factorization.

21707005968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5187 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 21707005968 in words is "twenty-one billion, seven hundred seven million, five thousand, nine hundred sixty-eight".