20242423217 has 2 divisors, whose sum is σ = 20242423218. Its totient is φ = 20242423216.

The previous prime is 20242423153. The next prime is 20242423241. The reversal of 20242423217 is 71232424202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19072714816 + 1169708401 = 138104^2 + 34201^2 .

It is a cyclic number.

It is not a de Polignac number, because 20242423217 - 2⁶ = 20242423153 is a prime.

It is a super-2 number, since 2×20242423217² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20242423217.

It is not a weakly prime, because it can be changed into another prime (20242423517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121211608 + 10121211609.

It is an arithmetic number, because the mean of its divisors is an integer number (10121211609).

Almost surely, 2^20242423217 is an apocalyptic number.

It is an amenable number.

20242423217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20242423217 is an equidigital number, since it uses as much as digits as its factorization.

20242423217 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 20242423217 its reverse (71232424202), we get a palindrome (91474847419).

The spelling of 20242423217 in words is "twenty billion, two hundred forty-two million, four hundred twenty-three thousand, two hundred seventeen".