20344101361 has 2 divisors, whose sum is σ = 20344101362. Its totient is φ = 20344101360.

The previous prime is 20344101359. The next prime is 20344101367. The reversal of 20344101361 is 16310144302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17265960000 + 3078141361 = 131400^2 + 55481^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344101361 - 2¹ = 20344101359 is a prime.

Together with 20344101359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20344101367) 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, 10172050680 + 10172050681.

It is an arithmetic number, because the mean of its divisors is an integer number (10172050681).

Almost surely, 2^20344101361 is an apocalyptic number.

It is an amenable number.

20344101361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344101361 is an equidigital number, since it uses as much as digits as its factorization.

20344101361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20344101361 its reverse (16310144302), we get a palindrome (36654245663).

The spelling of 20344101361 in words is "twenty billion, three hundred forty-four million, one hundred one thousand, three hundred sixty-one".