20426017 has 2 divisors, whose sum is σ = 20426018. Its totient is φ = 20426016.

The previous prime is 20426009. The next prime is 20426039. The reversal of 20426017 is 71062402.

It is an a-pointer prime, because the next prime (20426039) can be obtained adding 20426017 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15062161 + 5363856 = 3881^2 + 2316^2 .

It is a cyclic number.

It is not a de Polignac number, because 20426017 - 2³ = 20426009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20426317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213008 + 10213009.

It is an arithmetic number, because the mean of its divisors is an integer number (10213009).

Almost surely, 2^20426017 is an apocalyptic number.

It is an amenable number.

20426017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426017 is an equidigital number, since it uses as much as digits as its factorization.

20426017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20426017 is about 4519.5151288606. The cubic root of 20426017 is about 273.3555502795.

Adding to 20426017 its reverse (71062402), we get a palindrome (91488419).

The spelling of 20426017 in words is "twenty million, four hundred twenty-six thousand, seventeen".