20443211441 has 2 divisors, whose sum is σ = 20443211442. Its totient is φ = 20443211440.

The previous prime is 20443211401. The next prime is 20443211449. The reversal of 20443211441 is 14411234402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19841539600 + 601671841 = 140860^2 + 24529^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443211441 - 2¹⁴ = 20443195057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20443211441.

It is not a weakly prime, because it can be changed into another prime (20443211449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221605720 + 10221605721.

It is an arithmetic number, because the mean of its divisors is an integer number (10221605721).

Almost surely, 2^20443211441 is an apocalyptic number.

It is an amenable number.

20443211441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443211441 is an equidigital number, since it uses as much as digits as its factorization.

20443211441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 20443211441 its reverse (14411234402), we get a palindrome (34854445843).

The spelling of 20443211441 in words is "twenty billion, four hundred forty-three million, two hundred eleven thousand, four hundred forty-one".