The numbers in your cell are each 7 digits. If, in fact, you want to return the 7 digits in the cell that begin with 2000, then:
=MID(A1,FIND("2000",A1),7)
On the other hand, if the string of digits could be of any length, and not necessarily start with 2000, then
=LOOKUP(9.9E+307,--MID(A1,MIN(FIND({1,2,3,4,5,6,7,8,9,0},A1&"1234567890")),ROW(INDIRECT("1:20"))))
will return the numeric value of the first string of digits in a cell (i.e. drops leading zero's) If leading zero's need to be maintained, a different formula will work.