namcu -nac-na'u- gismu

x1 (li) is a number/quantifier/digit/value/figure (noun); refers to the value and not the symbol.

See also lerfu, mekso, klani.

In notes:

klani
x1 is measured by x2 (number) on scale x3 (si'o, property of x1 with kau).
lerfu
x1 (la'e zo BY/word-bu) is a letter/digit/symbol in alphabet/character-set x2 representing x3.
mekso
x1 [quantifier/expression] is a mathematical expression interpreted under rules/convention x2.
saclu
x1 (me'o) is the [decimal/binary] equivalent of fractional x2 (me'o) in base x3 (quantity).
frinyna'u
n1 is a rational/fractional number.
kacpoi
p1 is a sequence of numbers in ascending order.
lujna'u
x1 is a complex number.
mrena'u
n1 is a real number.
nacyuensni
x1 (quoted text) is the text that stands for the number x2 in language x3
tolfrinyna'u
x1 is an irrational number.
tolxarna'u
x1 is a real number.
astrato
x1 is a grammatical abstraction of type x2
ca'omcu
x1 is a complex number with argument x2 and phase x3
ka'omcu
x1 is a complex number with real part x2 and imaginary part x3
ka'o zei namcu
x1 is a complex number (understood as such).
ka'ozeino zei namcu
x1 is a pure real number (such that its imaginary part is 0) understood as an example of a complex number.
ma'u zei namcu
x1 is a positive number (greater than zero (0)), understood as a member of an ordered set with additive identity, such as the typical structure on the set of all real numbers.
ni'u zei namcu
x1 is a negative number (less than zero (0)), understood as a member of an ordered set with additive identity, such as the typical structure on the set of all real numbers.
nozeika'o zei namcu
x1 is a pure imaginary number (such that its real part is 0) understood as an example of a complex number.