20313121364533 has 2 divisors, whose sum is σ = 20313121364534. Its totient is φ = 20313121364532.

The previous prime is 20313121364507. The next prime is 20313121364579. The reversal of 20313121364533 is 33546312131302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20105018435044 + 208102929489 = 4483862^2 + 456183^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313121364533 - 2⁹ = 20313121364021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20313121364492 and 20313121364501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313121364933) 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, 10156560682266 + 10156560682267.

It is an arithmetic number, because the mean of its divisors is an integer number (10156560682267).

Almost surely, 2^{20313121364533} is an apocalyptic number.

It is an amenable number.

20313121364533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313121364533 is an equidigital number, since it uses as much as digits as its factorization.

20313121364533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 37.

Adding to 20313121364533 its reverse (33546312131302), we get a palindrome (53859433495835).

The spelling of 20313121364533 in words is "twenty trillion, three hundred thirteen billion, one hundred twenty-one million, three hundred sixty-four thousand, five hundred thirty-three".