20310360857 has 2 divisors, whose sum is σ = 20310360858. Its totient is φ = 20310360856.

The previous prime is 20310360823. The next prime is 20310360877. The reversal of 20310360857 is 75806301302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10828275481 + 9482085376 = 104059^2 + 97376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310360857 - 2¹² = 20310356761 is a prime.

It is not a weakly prime, because it can be changed into another prime (20310360877) 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, 10155180428 + 10155180429.

It is an arithmetic number, because the mean of its divisors is an integer number (10155180429).

Almost surely, 2^20310360857 is an apocalyptic number.

It is an amenable number.

20310360857 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310360857 is an equidigital number, since it uses as much as digits as its factorization.

20310360857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 20310360857 in words is "twenty billion, three hundred ten million, three hundred sixty thousand, eight hundred fifty-seven".