20313332191 has 2 divisors, whose sum is σ = 20313332192. Its totient is φ = 20313332190.

The previous prime is 20313332167. The next prime is 20313332219. The reversal of 20313332191 is 19123331302.

It is an a-pointer prime, because the next prime (20313332219) can be obtained adding 20313332191 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20313332191 - 2⁵ = 20313332159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313342191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156666095 + 10156666096.

It is an arithmetic number, because the mean of its divisors is an integer number (10156666096).

Almost surely, 2^20313332191 is an apocalyptic number.

20313332191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313332191 is an equidigital number, since it uses as much as digits as its factorization.

20313332191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 20313332191 its reverse (19123331302), we get a palindrome (39436663493).

The spelling of 20313332191 in words is "twenty billion, three hundred thirteen million, three hundred thirty-two thousand, one hundred ninety-one".