20426713 has 2 divisors, whose sum is σ = 20426714. Its totient is φ = 20426712.

The previous prime is 20426711. The next prime is 20426719. The reversal of 20426713 is 31762402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13520329 + 6906384 = 3677^2 + 2628^2 .

It is a cyclic number.

It is not a de Polignac number, because 20426713 - 2¹ = 20426711 is a prime.

Together with 20426711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20426711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213356 + 10213357.

It is an arithmetic number, because the mean of its divisors is an integer number (10213357).

Almost surely, 2^20426713 is an apocalyptic number.

It is an amenable number.

20426713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426713 is an equidigital number, since it uses as much as digits as its factorization.

20426713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20426713 is about 4519.5921276151. The cubic root of 20426713 is about 273.3586550340.

The spelling of 20426713 in words is "twenty million, four hundred twenty-six thousand, seven hundred thirteen".