20310103309 has 2 divisors, whose sum is σ = 20310103310. Its totient is φ = 20310103308.

The previous prime is 20310103259. The next prime is 20310103321. The reversal of 20310103309 is 90330101302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11619762025 + 8690341284 = 107795^2 + 93222^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310103309 - 2⁹ = 20310102797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20310103309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310103369) 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, 10155051654 + 10155051655.

It is an arithmetic number, because the mean of its divisors is an integer number (10155051655).

Almost surely, 2^20310103309 is an apocalyptic number.

It is an amenable number.

20310103309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310103309 is an equidigital number, since it uses as much as digits as its factorization.

20310103309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The spelling of 20310103309 in words is "twenty billion, three hundred ten million, one hundred three thousand, three hundred nine".