20042422450417 has 2 divisors, whose sum is σ = 20042422450418. Its totient is φ = 20042422450416.

The previous prime is 20042422450403. The next prime is 20042422450423. The reversal of 20042422450417 is 71405422424002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17459703467361 + 2582718983056 = 4178481^2 + 1607084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20042422450417 is a prime.

It is not a weakly prime, because it can be changed into another prime (20042422450447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021211225208 + 10021211225209.

It is an arithmetic number, because the mean of its divisors is an integer number (10021211225209).

Almost surely, 2^{20042422450417} is an apocalyptic number.

It is an amenable number.

20042422450417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042422450417 is an equidigital number, since it uses as much as digits as its factorization.

20042422450417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 143360, while the sum is 37.

Adding to 20042422450417 its reverse (71405422424002), we get a palindrome (91447844874419).

The spelling of 20042422450417 in words is "twenty trillion, forty-two billion, four hundred twenty-two million, four hundred fifty thousand, four hundred seventeen".