20944229 has 2 divisors, whose sum is σ = 20944230. Its totient is φ = 20944228.

The previous prime is 20944207. The next prime is 20944277. The reversal of 20944229 is 92244902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17447329 + 3496900 = 4177^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 20944229 - 2⁸ = 20943973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20944195 and 20944204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20944279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472114 + 10472115.

It is an arithmetic number, because the mean of its divisors is an integer number (10472115).

Almost surely, 2^20944229 is an apocalyptic number.

It is an amenable number.

20944229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20944229 is an equidigital number, since it uses as much as digits as its factorization.

20944229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20944229 is about 4576.4865344498. The cubic root of 20944229 is about 275.6479662511.

The spelling of 20944229 in words is "twenty million, nine hundred forty-four thousand, two hundred twenty-nine".