It is 354224848179261915075.
The 100th Fibonacci number is 354,224,848,179,261,915,075.
20 is not a term in the Fibonacci series.
A Fibonacci number series is like the example below, 1,1,2,3,5,8,13,21,34,55,89,144,233,377,610...... and so on in general Fibonacci numbers are just the previous two numbers added together starting with 1 and 0 then goes on forever.
The sum of the previous two numbers in the series.
A Fibonacci number, Fibonacci sequence or Fibonacci series are a mathematical term which follow a integer sequence. The first two numbers in Fibonacci sequence start with a 0 and 1 and each subsequent number is the sum of the previous two.
1,1,2,3,5,8,13,21,34,55
If the sequence is taken to start 1,1,2,... then the 100th term is 354,224,848,179,261,915,075 And you've got to hope I have typed that in correctly!
According to the link, zero is the first number in the series.
A Fibonacci series
The ratio of successive terms in the Fibonacci sequence approaches the Golden ratio as the number of terms increases.
37 is not in the Fibonacci number series, but is the sum of two Fibonacci numbers, 34 and 3. Fibonacci numbers are with 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, etc.
There is not a 100th book