20441324437 has 2 divisors, whose sum is σ = 20441324438. Its totient is φ = 20441324436.

The previous prime is 20441324429. The next prime is 20441324461. The reversal of 20441324437 is 73442314402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19609521156 + 831803281 = 140034^2 + 28841^2 .

It is a cyclic number.

It is not a de Polignac number, because 20441324437 - 2³ = 20441324429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20441324417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220662218 + 10220662219.

It is an arithmetic number, because the mean of its divisors is an integer number (10220662219).

Almost surely, 2^20441324437 is an apocalyptic number.

It is an amenable number.

20441324437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20441324437 is an equidigital number, since it uses as much as digits as its factorization.

20441324437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 34.

Adding to 20441324437 its reverse (73442314402), we get a palindrome (93883638839).

The spelling of 20441324437 in words is "twenty billion, four hundred forty-one million, three hundred twenty-four thousand, four hundred thirty-seven".