20839800959 has 2 divisors, whose sum is σ = 20839800960. Its totient is φ = 20839800958.

The previous prime is 20839800929. The next prime is 20839800991. The reversal of 20839800959 is 95900893802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20839800959 - 2²⁰ = 20838752383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20839800959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20839800929) 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 as a sum of consecutive naturals, namely, 10419900479 + 10419900480.

It is an arithmetic number, because the mean of its divisors is an integer number (10419900480).

Almost surely, 2^20839800959 is an apocalyptic number.

20839800959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20839800959 is an equidigital number, since it uses as much as digits as its factorization.

20839800959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 20839800959 in words is "twenty billion, eight hundred thirty-nine million, eight hundred thousand, nine hundred fifty-nine".