20426719 has 2 divisors, whose sum is σ = 20426720. Its totient is φ = 20426718.

The previous prime is 20426713. The next prime is 20426743. The reversal of 20426719 is 91762402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20426719 - 2³ = 20426711 is a prime.

It is a super-2 number, since 2×20426719² = 834501698209922, which contains 22 as substring.

It is a congruent number.

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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213359 + 10213360.

It is an arithmetic number, because the mean of its divisors is an integer number (10213360).

Almost surely, 2^20426719 is an apocalyptic number.

20426719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426719 is an equidigital number, since it uses as much as digits as its factorization.

20426719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20426719 is about 4519.5927913917. The cubic root of 20426719 is about 273.3586817988.

The spelling of 20426719 in words is "twenty million, four hundred twenty-six thousand, seven hundred nineteen".