20042421241 has 2 divisors, whose sum is σ = 20042421242. Its totient is φ = 20042421240.

The previous prime is 20042421211. The next prime is 20042421247. The reversal of 20042421241 is 14212424002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15173312400 + 4869108841 = 123180^2 + 69779^2 .

It is a cyclic number.

It is not a de Polignac number, because 20042421241 - 2⁹ = 20042420729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20042421247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021210620 + 10021210621.

It is an arithmetic number, because the mean of its divisors is an integer number (10021210621).

Almost surely, 2^20042421241 is an apocalyptic number.

It is an amenable number.

20042421241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042421241 is an equidigital number, since it uses as much as digits as its factorization.

20042421241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20042421241 its reverse (14212424002), we get a palindrome (34254845243).

The spelling of 20042421241 in words is "twenty billion, forty-two million, four hundred twenty-one thousand, two hundred forty-one".