20441431532521 has 2 divisors, whose sum is σ = 20441431532522. Its totient is φ = 20441431532520.

The previous prime is 20441431532503. The next prime is 20441431532527. The reversal of 20441431532521 is 12523513414402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17841871873296 + 2599559659225 = 4223964^2 + 1612315^2 .

It is a cyclic number.

It is not a de Polignac number, because 20441431532521 - 2³³ = 20432841597929 is a prime.

It is not a weakly prime, because it can be changed into another prime (20441431532527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220715766260 + 10220715766261.

It is an arithmetic number, because the mean of its divisors is an integer number (10220715766261).

Almost surely, 2^{20441431532521} is an apocalyptic number.

It is an amenable number.

20441431532521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20441431532521 is an equidigital number, since it uses as much as digits as its factorization.

20441431532521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 20441431532521 its reverse (12523513414402), we get a palindrome (32964944946923).

The spelling of 20441431532521 in words is "twenty trillion, four hundred forty-one billion, four hundred thirty-one million, five hundred thirty-two thousand, five hundred twenty-one".