20026205 has 4 divisors (see below), whose sum is σ = 24031452. Its totient is φ = 16020960.

The previous prime is 20026177. The next prime is 20026207. The reversal of 20026205 is 50262002.

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 3076516 + 16949689 = 1754^2 + 4117^2 .

It is not a de Polignac number, because 20026205 - 2⁶ = 20026141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20026207) 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, 2002616 + ... + 2002625.

It is an arithmetic number, because the mean of its divisors is an integer number (6007863).

Almost surely, 2^20026205 is an apocalyptic number.

It is an amenable number.

20026205 is a deficient number, since it is larger than the sum of its proper divisors (4005247).

20026205 is an equidigital number, since it uses as much as digits as its factorization.

20026205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005246.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20026205 is about 4475.0648040000. The cubic root of 20026205 is about 271.5602621089.

Adding to 20026205 its reverse (50262002), we get a palindrome (70288207).

The spelling of 20026205 in words is "twenty million, twenty-six thousand, two hundred five".