20304302321291 has 2 divisors, whose sum is σ = 20304302321292. Its totient is φ = 20304302321290.

The previous prime is 20304302321239. The next prime is 20304302321293. The reversal of 20304302321291 is 19212320340302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20304302321291 is a prime.

Together with 20304302321293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20304302321293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10152151160645 + 10152151160646.

It is an arithmetic number, because the mean of its divisors is an integer number (10152151160646).

Almost surely, 2^{20304302321291} is an apocalyptic number.

20304302321291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20304302321291 is an equidigital number, since it uses as much as digits as its factorization.

20304302321291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 20304302321291 its reverse (19212320340302), we get a palindrome (39516622661593).

The spelling of 20304302321291 in words is "twenty trillion, three hundred four billion, three hundred two million, three hundred twenty-one thousand, two hundred ninety-one".