20769776216 has 96 divisors (see below), whose sum is σ = 45675057600. Its totient is φ = 8828305920.

The previous prime is 20769776213. The next prime is 20769776219. The reversal of 20769776216 is 61267796702.

It is an interprime number because it is at equal distance from previous prime (20769776213) and next prime (20769776219).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20769776213) 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, 45447860 + ... + 45448316.

It is an arithmetic number, because the mean of its divisors is an integer number (475781850).

Almost surely, 2^20769776216 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 20769776216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22837528800).

20769776216 is an abundant number, since it is smaller than the sum of its proper divisors (24905281384).

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

20769776216 is a wasteful number, since it uses less digits than its factorization.

20769776216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 20769776216 in words is "twenty billion, seven hundred sixty-nine million, seven hundred seventy-six thousand, two hundred sixteen".