20424221417 has 2 divisors, whose sum is σ = 20424221418. Its totient is φ = 20424221416.

The previous prime is 20424221383. The next prime is 20424221423. The reversal of 20424221417 is 71412242402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20051692816 + 372528601 = 141604^2 + 19301^2 .

It is a cyclic number.

It is not a de Polignac number, because 20424221417 - 2⁸ = 20424221161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20424221417.

It is not a weakly prime, because it can be changed into another prime (20424221317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212110708 + 10212110709.

It is an arithmetic number, because the mean of its divisors is an integer number (10212110709).

Almost surely, 2^20424221417 is an apocalyptic number.

It is an amenable number.

20424221417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424221417 is an equidigital number, since it uses as much as digits as its factorization.

20424221417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 29.

Adding to 20424221417 its reverse (71412242402), we get a palindrome (91836463819).

The spelling of 20424221417 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-one thousand, four hundred seventeen".