20711065968 has 180 divisors, whose sum is σ = 59737044640. Its totient is φ = 6696787968.

The previous prime is 20711065939. The next prime is 20711065987. The reversal of 20711065968 is 86956011702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 151175596 + ... + 151175732.

Almost surely, 2^20711065968 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 20711065968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29868522320).

20711065968 is an abundant number, since it is smaller than the sum of its proper divisors (39025978672).

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

20711065968 is a wasteful number, since it uses less digits than its factorization.

20711065968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 20711065968 in words is "twenty billion, seven hundred eleven million, sixty-five thousand, nine hundred sixty-eight".