20236005 has 12 divisors (see below), whose sum is σ = 35075820. Its totient is φ = 10792512.

The previous prime is 20235989. The next prime is 20236031. The reversal of 20236005 is 50063202.

It can be written as a sum of positive squares in 2 ways, for example, as 6796449 + 13439556 = 2607^2 + 3666^2 .

It is not a de Polignac number, because 20236005 - 2⁴ = 20235989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 224800 + ... + 224889.

It is an arithmetic number, because the mean of its divisors is an integer number (2922985).

Almost surely, 2^20236005 is an apocalyptic number.

It is an amenable number.

20236005 is a deficient number, since it is larger than the sum of its proper divisors (14839815).

20236005 is a wasteful number, since it uses less digits than its factorization.

20236005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449700 (or 449697 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20236005 is about 4498.4447312377. Note that the first 3 decimals coincide. The cubic root of 20236005 is about 272.5052828423.

Adding to 20236005 its reverse (50063202), we get a palindrome (70299207).

The spelling of 20236005 in words is "twenty million, two hundred thirty-six thousand, five".