A single number, such as 12848384 does not make a series.
3 * 2 = 6 * 3= 18 *4 =72 *5 = 360
The next number works out as 365
The next whole number is: 1,000,001
The next whole number is 21,000
10
57
One number does not make a sequence (nor a series).
11 comes next.
The number 7 comes next.
There is no series of number: just one very large number!
10
mcmlx
It is: 4554
A single number cannot define a sequence, even less a series.
The next number is the sequence 236175969, 48, 12 is 236175861.
The series seems to be "add 3," so the next number in the series would be 12 followed by 15.