20779916713 has 8 divisors (see below), whose sum is σ = 22004579520. Its totient is φ = 19568352240.

The previous prime is 20779916669. The next prime is 20779916741. The reversal of 20779916713 is 31761997702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20779916713 - 2³³ = 12189982121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20779914713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3271318 + ... + 3277663.

It is an arithmetic number, because the mean of its divisors is an integer number (2750572440).

Almost surely, 2^20779916713 is an apocalyptic number.

It is an amenable number.

20779916713 is a deficient number, since it is larger than the sum of its proper divisors (1224662807).

20779916713 is a wasteful number, since it uses less digits than its factorization.

20779916713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549167.

The product of its (nonzero) digits is 1000188, while the sum is 52.

The spelling of 20779916713 in words is "twenty billion, seven hundred seventy-nine million, nine hundred sixteen thousand, seven hundred thirteen".