Millions Billions Trillions Names Of Large Numbers

Standard dictionary numbers

Name Short scale
(U.S., Canada and
modern British)
Long scale
(continental Europe,
older British)
Authorities
AHD4[1] CED[2] COD[3] OED2[4] OEDnew[5] RHD2[6] SOED3[7] W3[8] UM[9]
Million 106 106
Milliard 109
Billion 109 1012
Trillion 1012 1018
Quadrillion 1015 1024
Quintillion 1018 1030
Sextillion 1021 1036
Septillion 1024 1042
Octillion 1027 1048
Nonillion 1030 1054
Decillion 1033 1060
Undecillion 1036 1066
Duodecillion 1039 1072
Tredecillion 1042 1078
Quattuordecillion 1045 1084
Quindecillion (Quinquadecillion) 1048 1090
Sexdecillion (Sedecillion) 1051 1096
Septendecillion 1054 10102
Octodecillion 1057 10108
Novemdecillion (Novendecillion) 1060 10114
Vigintillion 1063 10120
Centillion 10303 10600
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