20310322261 has 2 divisors, whose sum is σ = 20310322262. Its totient is φ = 20310322260.

The previous prime is 20310322223. The next prime is 20310322271. The reversal of 20310322261 is 16222301302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20303400100 + 6922161 = 142490^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310322261 - 2⁷ = 20310322133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310322211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155161130 + 10155161131.

It is an arithmetic number, because the mean of its divisors is an integer number (10155161131).

Almost surely, 2^20310322261 is an apocalyptic number.

It is an amenable number.

20310322261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310322261 is an equidigital number, since it uses as much as digits as its factorization.

20310322261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20310322261 its reverse (16222301302), we get a palindrome (36532623563).

The spelling of 20310322261 in words is "twenty billion, three hundred ten million, three hundred twenty-two thousand, two hundred sixty-one".