20320312321 has 2 divisors, whose sum is σ = 20320312322. Its totient is φ = 20320312320.

The previous prime is 20320312301. The next prime is 20320312333. The reversal of 20320312321 is 12321302302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12783468096 + 7536844225 = 113064^2 + 86815^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320312321 - 2⁵ = 20320312289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20320312301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160156160 + 10160156161.

It is an arithmetic number, because the mean of its divisors is an integer number (10160156161).

Almost surely, 2^20320312321 is an apocalyptic number.

It is an amenable number.

20320312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320312321 is an equidigital number, since it uses as much as digits as its factorization.

20320312321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20320312321 its reverse (12321302302), we get a palindrome (32641614623).

The spelling of 20320312321 in words is "twenty billion, three hundred twenty million, three hundred twelve thousand, three hundred twenty-one".