20711277782 has 16 divisors (see below), whose sum is σ = 33914993280. Its totient is φ = 9428104512.

The previous prime is 20711277781. The next prime is 20711277799. The reversal of 20711277782 is 28777211702.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711277781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5454182 + ... + 5457977.

It is an arithmetic number, because the mean of its divisors is an integer number (2119687080).

Almost surely, 2^20711277782 is an apocalyptic number.

20711277782 is a deficient number, since it is larger than the sum of its proper divisors (13203715498).

20711277782 is a wasteful number, since it uses less digits than its factorization.

20711277782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10912247.

The product of its (nonzero) digits is 153664, while the sum is 44.

The spelling of 20711277782 in words is "twenty billion, seven hundred eleven million, two hundred seventy-seven thousand, seven hundred eighty-two".