20321333297 has 2 divisors, whose sum is σ = 20321333298. Its totient is φ = 20321333296.

The previous prime is 20321333287. The next prime is 20321333323. The reversal of 20321333297 is 79233312302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19526149696 + 795183601 = 139736^2 + 28199^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321333297 - 2⁴ = 20321333281 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321333287) 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, 10160666648 + 10160666649.

It is an arithmetic number, because the mean of its divisors is an integer number (10160666649).

Almost surely, 2^20321333297 is an apocalyptic number.

It is an amenable number.

20321333297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321333297 is an equidigital number, since it uses as much as digits as its factorization.

20321333297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 35.

Adding to 20321333297 its reverse (79233312302), we get a palindrome (99554645599).

The spelling of 20321333297 in words is "twenty billion, three hundred twenty-one million, three hundred thirty-three thousand, two hundred ninety-seven".