20568401 has 4 divisors (see below), whose sum is σ = 23506752. Its totient is φ = 17630052.

The previous prime is 20568391. The next prime is 20568421. The reversal of 20568401 is 10486502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20568401 - 2¹⁰ = 20567377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20568421) 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 3 ways as a sum of consecutive naturals, for example, 1469165 + ... + 1469178.

It is an arithmetic number, because the mean of its divisors is an integer number (5876688).

Almost surely, 2^20568401 is an apocalyptic number.

It is an amenable number.

20568401 is a deficient number, since it is larger than the sum of its proper divisors (2938351).

20568401 is an equidigital number, since it uses as much as digits as its factorization.

20568401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938350.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20568401 is about 4535.2399054515. The cubic root of 20568401 is about 273.9892415901.

The spelling of 20568401 in words is "twenty million, five hundred sixty-eight thousand, four hundred one".