20445411013 has 2 divisors, whose sum is σ = 20445411014. Its totient is φ = 20445411012.

The previous prime is 20445411011. The next prime is 20445411043. The reversal of 20445411013 is 31011454402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19766391649 + 679019364 = 140593^2 + 26058^2 .

It is a cyclic number.

It is not a de Polignac number, because 20445411013 - 2¹ = 20445411011 is a prime.

Together with 20445411011, 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 (20445411011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222705506 + 10222705507.

It is an arithmetic number, because the mean of its divisors is an integer number (10222705507).

Almost surely, 2^20445411013 is an apocalyptic number.

It is an amenable number.

20445411013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445411013 is an equidigital number, since it uses as much as digits as its factorization.

20445411013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 20445411013 its reverse (31011454402), we get a palindrome (51456865415).

The spelling of 20445411013 in words is "twenty billion, four hundred forty-five million, four hundred eleven thousand, thirteen".