This is a new one to this old dog. 2k18 is 2018. 1k7 looks to me like 1007. Much shorter to use 1.7kW which most know how to parse to 1.7 x 10<sup>3</sup> Watts.
I can vouch for the fact that 1k7=1700 is a common convention. It comes from the face that . can be hard to read sometimes. You often also see something like an “0R5” resistor which is 500 milliohms.
More common in EE contexts than anywhere else.