20026705 has 4 divisors (see below), whose sum is σ = 24032052. Its totient is φ = 16021360.

The previous prime is 20026681. The next prime is 20026709. The reversal of 20026705 is 50762002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6395841 + 13630864 = 2529^2 + 3692^2 .

It is not a de Polignac number, because 20026705 - 2⁵ = 20026673 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20026709) by changing a digit.

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, 2002666 + ... + 2002675.

It is an arithmetic number, because the mean of its divisors is an integer number (6008013).

Almost surely, 2^20026705 is an apocalyptic number.

It is an amenable number.

20026705 is a deficient number, since it is larger than the sum of its proper divisors (4005347).

20026705 is an equidigital number, since it uses as much as digits as its factorization.

20026705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005346.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20026705 is about 4475.1206687641. The cubic root of 20026705 is about 271.5625221310.

Adding to 20026705 its reverse (50762002), we get a palindrome (70788707).

The spelling of 20026705 in words is "twenty million, twenty-six thousand, seven hundred five".