20317426 has 8 divisors (see below), whose sum is σ = 30790620. Its totient is φ = 10053888.

The previous prime is 20317411. The next prime is 20317439. The reversal of 20317426 is 62471302.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 1836025 = 4299^2 + 1355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20317426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52171 + ... + 52558.

Almost surely, 2^20317426 is an apocalyptic number.

20317426 is a deficient number, since it is larger than the sum of its proper divisors (10473194).

20317426 is a wasteful number, since it uses less digits than its factorization.

20317426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104828.

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

The square root of 20317426 is about 4507.4855518349. The cubic root of 20317426 is about 272.8702751932.

Adding to 20317426 its reverse (62471302), we get a palindrome (82788728).

The spelling of 20317426 in words is "twenty million, three hundred seventeen thousand, four hundred twenty-six".