20344510251313 has 2 divisors, whose sum is σ = 20344510251314. Its totient is φ = 20344510251312.

The previous prime is 20344510251259. The next prime is 20344510251371. The reversal of 20344510251313 is 31315201544302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19621427033664 + 723083217649 = 4429608^2 + 850343^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344510251313 - 2³⁷ = 20207071297841 is a prime.

It is not a weakly prime, because it can be changed into another prime (20344510251413) 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, 10172255125656 + 10172255125657.

It is an arithmetic number, because the mean of its divisors is an integer number (10172255125657).

Almost surely, 2^{20344510251313} is an apocalyptic number.

It is an amenable number.

20344510251313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344510251313 is an equidigital number, since it uses as much as digits as its factorization.

20344510251313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 20344510251313 its reverse (31315201544302), we get a palindrome (51659711795615).

The spelling of 20344510251313 in words is "twenty trillion, three hundred forty-four billion, five hundred ten million, two hundred fifty-one thousand, three hundred thirteen".