20260026426217 has 2 divisors, whose sum is σ = 20260026426218. Its totient is φ = 20260026426216.

The previous prime is 20260026426191. The next prime is 20260026426257. The reversal of 20260026426217 is 71262462006202.

It is an a-pointer prime, because the next prime (20260026426257) can be obtained adding 20260026426217 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17902131050281 + 2357895375936 = 4231091^2 + 1535544^2 .

It is a cyclic number.

It is not a de Polignac number, because 20260026426217 - 2⁷ = 20260026426089 is a prime.

It is a super-2 number, since 2×20260026426217² (a number of 27 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 20260026426217.

It is not a weakly prime, because it can be changed into another prime (20260026426257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10130013213108 + 10130013213109.

It is an arithmetic number, because the mean of its divisors is an integer number (10130013213109).

Almost surely, 2^{20260026426217} is an apocalyptic number.

It is an amenable number.

20260026426217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20260026426217 is an equidigital number, since it uses as much as digits as its factorization.

20260026426217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 20260026426217 in words is "twenty trillion, two hundred sixty billion, twenty-six million, four hundred twenty-six thousand, two hundred seventeen".