20417426 has 12 divisors (see below), whose sum is σ = 31396506. Its totient is φ = 9958080.

The previous prime is 20417417. The next prime is 20417429. The reversal of 20417426 is 62471402.

It can be written as a sum of positive squares in 3 ways, for example, as 11566801 + 8850625 = 3401^2 + 2975^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20417395 and 20417404.

It is not an unprimeable number, because it can be changed into a prime (20417429) 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 in 5 ways as a sum of consecutive naturals, for example, 326 + ... + 6398.

Almost surely, 2^20417426 is an apocalyptic number.

20417426 is a deficient number, since it is larger than the sum of its proper divisors (10979080).

20417426 is an equidigital number, since it uses as much as digits as its factorization.

20417426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157 (or 6116 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20417426 is about 4518.5645950899. The cubic root of 20417426 is about 273.3172212725.

Adding to 20417426 its reverse (62471402), we get a palindrome (82888828).

The spelling of 20417426 in words is "twenty million, four hundred seventeen thousand, four hundred twenty-six".