20338229 has 2 divisors, whose sum is σ = 20338230. Its totient is φ = 20338228.

The previous prime is 20338223. The next prime is 20338243. The reversal of 20338229 is 92283302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 70225 = 4502^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 20338229 - 2²⁰ = 19289653 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20338223) 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 as a sum of consecutive naturals, namely, 10169114 + 10169115.

It is an arithmetic number, because the mean of its divisors is an integer number (10169115).

Almost surely, 2^20338229 is an apocalyptic number.

It is an amenable number.

20338229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20338229 is an equidigital number, since it uses as much as digits as its factorization.

20338229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20338229 is about 4509.7925672918. The cubic root of 20338229 is about 272.9633739949.

The spelling of 20338229 in words is "twenty million, three hundred thirty-eight thousand, two hundred twenty-nine".