20335229 has 2 divisors, whose sum is σ = 20335230. Its totient is φ = 20335228.

The previous prime is 20335223. The next prime is 20335253. The reversal of 20335229 is 92253302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 9012004 = 3365^2 + 3002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20335229 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20335198 and 20335207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20335223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167614 + 10167615.

It is an arithmetic number, because the mean of its divisors is an integer number (10167615).

Almost surely, 2^20335229 is an apocalyptic number.

It is an amenable number.

20335229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20335229 is an equidigital number, since it uses as much as digits as its factorization.

20335229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 20335229 is about 4509.4599454924. The cubic root of 20335229 is about 272.9499521381.

The spelling of 20335229 in words is "twenty million, three hundred thirty-five thousand, two hundred twenty-nine".