We divide 20580873 by 20
We're looking to find how many times 20 goes into 20580873.

Going ahead to step 1:
2 divided by 20 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 20

Moving on to step 2:
20 can be fit into 20 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 20 from 20 leaves us with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 20

Going ahead to step 3:
20 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 5, we end up with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 20

Going ahead to step 4:
When dividing 58 by 20, we get 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 102.0
If we take 40 away from 58, we end up with 18.
Bring next digit (0) of the dividend behind the 18 and repeat the process: 180 / 20

Step 5:
If we divide 180 by 20, we get 9 and a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 1029.0
Subtract 180 from 180 to get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 20

On to step 6:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 10290.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 20

Advancing to step 7:
If we divide 87 by 20, we get 4 and a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 102904.0
The remainder is 7 after subtracting 80 from 87.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 20

Going ahead to step 8:
73 divided by 20 is 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 1029043.0
Deduct 60 from 73 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
When dividing 130 by 20, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 1029043.6
Subtract 120 from 130 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
When dividing 100 by 20, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1029043.65
Deduct 100 from 100 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
If we divide 0 by 20, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1029043.65
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 12:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1029043.65
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 1029043.65 with a remainder of 0.0.