20820882759 has 4 divisors (see below), whose sum is σ = 27761177016. Its totient is φ = 13880588504.

The previous prime is 20820882743. The next prime is 20820882853. The reversal of 20820882759 is 95728802802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20820882759 - 2⁴ = 20820882743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20827882759) 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 3 ways as a sum of consecutive naturals, for example, 3470147124 + ... + 3470147129.

It is an arithmetic number, because the mean of its divisors is an integer number (6940294254).

Almost surely, 2^20820882759 is an apocalyptic number.

20820882759 is a deficient number, since it is larger than the sum of its proper divisors (6940294257).

20820882759 is an equidigital number, since it uses as much as digits as its factorization.

20820882759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940294256.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 20820882759 in words is "twenty billion, eight hundred twenty million, eight hundred eighty-two thousand, seven hundred fifty-nine".