20323113197 has 2 divisors, whose sum is σ = 20323113198. Its totient is φ = 20323113196.

The previous prime is 20323113193. The next prime is 20323113259. The reversal of 20323113197 is 79131132302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19639499881 + 683613316 = 140141^2 + 26146^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323113197 - 2² = 20323113193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20323113193) 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, 10161556598 + 10161556599.

It is an arithmetic number, because the mean of its divisors is an integer number (10161556599).

Almost surely, 2^20323113197 is an apocalyptic number.

It is an amenable number.

20323113197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323113197 is an equidigital number, since it uses as much as digits as its factorization.

20323113197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

Adding to 20323113197 its reverse (79131132302), we get a palindrome (99454245499).

The spelling of 20323113197 in words is "twenty billion, three hundred twenty-three million, one hundred thirteen thousand, one hundred ninety-seven".