20311210289 has 2 divisors, whose sum is σ = 20311210290. Its totient is φ = 20311210288.

The previous prime is 20311210279. The next prime is 20311210333. The reversal of 20311210289 is 98201211302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13712410000 + 6598800289 = 117100^2 + 81233^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311210289 - 2²⁰ = 20310161713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20311210279) 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, 10155605144 + 10155605145.

It is an arithmetic number, because the mean of its divisors is an integer number (10155605145).

Almost surely, 2^20311210289 is an apocalyptic number.

It is an amenable number.

20311210289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311210289 is an equidigital number, since it uses as much as digits as its factorization.

20311210289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 20311210289 in words is "twenty billion, three hundred eleven million, two hundred ten thousand, two hundred eighty-nine".