A single number, such as 21357, does not define a sequence.
A single number, such as 2481020, cannot define a sequence.
The next number is 0
It is not possible to identify a sequence when given only one number, as in this questions.
A single number cannot define a sequence.
Each following number in the sequence is being divided by 4. Therefore, the next number in the sequence is 3/4 = 0.75.
The next number in the sequence would be 23. The sequence consists of prime numbers.
If you mean: 9, 19, 39, 69 then the next number in the sequence is 109
The next number in the sequence is 48.
The next number is the sequence 236175969, 48, 12 is 236175861.
One number does not make a sequence (nor a series).
The next number in the sequence would be 25.
You are multiplying each number in the sequence by -2. Therefore, the next number in the sequence after 32 is -64.
I'm fairly sure you meant the "4" to be a "3" in this sequence. There is no "next number" in the sequence given, since there is no rule that encompasses the entire sequence. And to be fair, in number sequences, any number can still logically be "next". If it's not the number that you expect, it is still a number sequence. It is just not a predicable one.