20734229 has 2 divisors, whose sum is σ = 20734230. Its totient is φ = 20734228.

The previous prime is 20734199. The next prime is 20734243. The reversal of 20734229 is 92243702.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 9778129 = 3310^2 + 3127^2 .

It is a cyclic number.

It is not a de Polignac number, because 20734229 - 2¹⁶ = 20668693 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 (20734279) 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 as a sum of consecutive naturals, namely, 10367114 + 10367115.

It is an arithmetic number, because the mean of its divisors is an integer number (10367115).

Almost surely, 2^20734229 is an apocalyptic number.

It is an amenable number.

20734229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734229 is an equidigital number, since it uses as much as digits as its factorization.

20734229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20734229 is about 4553.4853683744. The cubic root of 20734229 is about 274.7235966594.

The spelling of 20734229 in words is "twenty million, seven hundred thirty-four thousand, two hundred twenty-nine".