20320215353 has 2 divisors, whose sum is σ = 20320215354. Its totient is φ = 20320215352.

The previous prime is 20320215319. The next prime is 20320215371. The reversal of 20320215353 is 35351202302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14036799529 + 6283415824 = 118477^2 + 79268^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320215353 - 2¹⁰ = 20320214329 is a prime.

It is a super-2 number, since 2×20320215353² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20320215313) 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, 10160107676 + 10160107677.

It is an arithmetic number, because the mean of its divisors is an integer number (10160107677).

Almost surely, 2^20320215353 is an apocalyptic number.

It is an amenable number.

20320215353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320215353 is an equidigital number, since it uses as much as digits as its factorization.

20320215353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20320215353 its reverse (35351202302), we get a palindrome (55671417655).

The spelling of 20320215353 in words is "twenty billion, three hundred twenty million, two hundred fifteen thousand, three hundred fifty-three".