20445224453 has 2 divisors, whose sum is σ = 20445224454. Its totient is φ = 20445224452.

The previous prime is 20445224407. The next prime is 20445224473. The reversal of 20445224453 is 35442254402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20398123684 + 47100769 = 142822^2 + 6863^2 .

It is a cyclic number.

It is not a de Polignac number, because 20445224453 - 2⁸ = 20445224197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20445224473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222612226 + 10222612227.

It is an arithmetic number, because the mean of its divisors is an integer number (10222612227).

Almost surely, 2^20445224453 is an apocalyptic number.

It is an amenable number.

20445224453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445224453 is an equidigital number, since it uses as much as digits as its factorization.

20445224453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153600, while the sum is 35.

Adding to 20445224453 its reverse (35442254402), we get a palindrome (55887478855).

The spelling of 20445224453 in words is "twenty billion, four hundred forty-five million, two hundred twenty-four thousand, four hundred fifty-three".