20308106297 has 2 divisors, whose sum is σ = 20308106298. Its totient is φ = 20308106296.

The previous prime is 20308106237. The next prime is 20308106317. The reversal of 20308106297 is 79260180302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17467322896 + 2840783401 = 132164^2 + 53299^2 .

It is a cyclic number.

It is not a de Polignac number, because 20308106297 - 2²⁶ = 20240997433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20308106297.

It is not a weakly prime, because it can be changed into another prime (20308106237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10154053148 + 10154053149.

It is an arithmetic number, because the mean of its divisors is an integer number (10154053149).

Almost surely, 2^20308106297 is an apocalyptic number.

It is an amenable number.

20308106297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20308106297 is an equidigital number, since it uses as much as digits as its factorization.

20308106297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 20308106297 its reverse (79260180302), we get a palindrome (99568286599).

The spelling of 20308106297 in words is "twenty billion, three hundred eight million, one hundred six thousand, two hundred ninety-seven".