20644112053 has 2 divisors, whose sum is σ = 20644112054. Its totient is φ = 20644112052.

The previous prime is 20644112051. The next prime is 20644112077. The reversal of 20644112053 is 35021144602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20622970449 + 21141604 = 143607^2 + 4598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20644112053 - 2¹ = 20644112051 is a prime.

Together with 20644112051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20644112051) 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, 10322056026 + 10322056027.

It is an arithmetic number, because the mean of its divisors is an integer number (10322056027).

Almost surely, 2^20644112053 is an apocalyptic number.

It is an amenable number.

20644112053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20644112053 is an equidigital number, since it uses as much as digits as its factorization.

20644112053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20644112053 its reverse (35021144602), we get a palindrome (55665256655).

The spelling of 20644112053 in words is "twenty billion, six hundred forty-four million, one hundred twelve thousand, fifty-three".