20313331361 has 2 divisors, whose sum is σ = 20313331362. Its totient is φ = 20313331360.

The previous prime is 20313331301. The next prime is 20313331373. The reversal of 20313331361 is 16313331302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15628750225 + 4684581136 = 125015^2 + 68444^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313331361 - 2¹⁰ = 20313330337 is a prime.

It is a super-2 number, since 2×20313331361² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20313331361.

It is not a weakly prime, because it can be changed into another prime (20313331301) 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, 10156665680 + 10156665681.

It is an arithmetic number, because the mean of its divisors is an integer number (10156665681).

Almost surely, 2^20313331361 is an apocalyptic number.

It is an amenable number.

20313331361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313331361 is an equidigital number, since it uses as much as digits as its factorization.

20313331361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 20313331361 its reverse (16313331302), we get a palindrome (36626662663).

The spelling of 20313331361 in words is "twenty billion, three hundred thirteen million, three hundred thirty-one thousand, three hundred sixty-one".