20002252345217 has 2 divisors, whose sum is σ = 20002252345218. Its totient is φ = 20002252345216.

The previous prime is 20002252345199. The next prime is 20002252345267. The reversal of 20002252345217 is 71254325220002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18361147870081 + 1641104475136 = 4284991^2 + 1281056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002252345217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20002252345267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001126172608 + 10001126172609.

It is an arithmetic number, because the mean of its divisors is an integer number (10001126172609).

Almost surely, 2^{20002252345217} is an apocalyptic number.

It is an amenable number.

20002252345217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002252345217 is an equidigital number, since it uses as much as digits as its factorization.

20002252345217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 35.

Adding to 20002252345217 its reverse (71254325220002), we get a palindrome (91256577565219).

The spelling of 20002252345217 in words is "twenty trillion, two billion, two hundred fifty-two million, three hundred forty-five thousand, two hundred seventeen".