20769129768 has 64 divisors (see below), whose sum is σ = 53828236800. Its totient is φ = 6670909440.

The previous prime is 20769129763. The next prime is 20769129779. The reversal of 20769129768 is 86792196702.

It is not an unprimeable number, because it can be changed into a prime (20769129761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113448 + ... + 233256.

It is an arithmetic number, because the mean of its divisors is an integer number (841066200).

Almost surely, 2^20769129768 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 20769129768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26914118400).

20769129768 is an abundant number, since it is smaller than the sum of its proper divisors (33059107032).

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

20769129768 is a wasteful number, since it uses less digits than its factorization.

20769129768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120082 (or 120078 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 20769129768 in words is "twenty billion, seven hundred sixty-nine million, one hundred twenty-nine thousand, seven hundred sixty-eight".