20445132413 has 2 divisors, whose sum is σ = 20445132414. Its totient is φ = 20445132412.

The previous prime is 20445132371. The next prime is 20445132503. The reversal of 20445132413 is 31423154402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15695579524 + 4749552889 = 125282^2 + 68917^2 .

It is a cyclic number.

It is not a de Polignac number, because 20445132413 - 2⁸ = 20445132157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20447132413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222566206 + 10222566207.

It is an arithmetic number, because the mean of its divisors is an integer number (10222566207).

Almost surely, 2^20445132413 is an apocalyptic number.

It is an amenable number.

20445132413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445132413 is an equidigital number, since it uses as much as digits as its factorization.

20445132413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20445132413 its reverse (31423154402), we get a palindrome (51868286815).

The spelling of 20445132413 in words is "twenty billion, four hundred forty-five million, one hundred thirty-two thousand, four hundred thirteen".