20404302240017 has 2 divisors, whose sum is σ = 20404302240018. Its totient is φ = 20404302240016.

The previous prime is 20404302239989. The next prime is 20404302240029. The reversal of 20404302240017 is 71004220340402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11153756396176 + 9250545843841 = 3339724^2 + 3041471^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404302240017 - 2¹² = 20404302235921 is a prime.

It is not a weakly prime, because it can be changed into another prime (20404302240097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202151120008 + 10202151120009.

It is an arithmetic number, because the mean of its divisors is an integer number (10202151120009).

Almost surely, 2^{20404302240017} is an apocalyptic number.

It is an amenable number.

20404302240017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404302240017 is an equidigital number, since it uses as much as digits as its factorization.

20404302240017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 29.

Adding to 20404302240017 its reverse (71004220340402), we get a palindrome (91408522580419).

The spelling of 20404302240017 in words is "twenty trillion, four hundred four billion, three hundred two million, two hundred forty thousand, seventeen".