2118
IC 2118 is the Witch Head Nebula.
- Even
- Composite
Where 2118 fits
Why 2118 is special
It is illuminated by Rigel, a star that is not part of it, which makes it a nebula lit from outside.
2118 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 3, 6, 353, 706, 1059, 2118
- Prime factorisation
- 2 × 3 × 353
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 2118
- Scientific notation
- 2.118 × 10^3
Roman numerals
M M C X V I I I
Binary
1 0 0 0 0 1 0 0 0 1 1 0
1 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 2,118
Octal
4 1 0 6
4 × 512 + 1 × 64 + 0 × 8 + 6 × 1 = 2,118
Hexadecimal
8 4 6
8 × 256 + 4 × 16 + 6 × 1 = 2,118
Read as powers of two: 2,048 + 64 + 4 + 2 = 2,118.
In historical numeral systems
Egyptian
2 lotuses, 1 coil of rope, 1 hobble, 8 strokes
2 × 1,000 + 1 × 100 + 1 × 10 + 8 × 1 = 2,118. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 5 vertical wedges (sixties place), 1 corner wedge + 8 vertical wedges (units place)
35 × 60 + 18 = 2118. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Happy number
Related numbers & connections
Both are reflection nebulae, and one is lit by a star that is not part of it at all.
View 7023 →Other connections
- is associated with7023
why?
Strength 0.50, confidence "high".
Science
IC 2118 is a reflection nebula illuminated by the supergiant Rigel, which lies nearby but is not physically associated in the way an embedded star would be.
DocumentedSciencePeriod: 1786–
Common questions
Is 2118 a prime number?
No, 2118 is not prime.
What are the factors of 2118?
The factors of 2118 are 1, 2, 3, 6, 353, 706, 1059, 2118.
What is 2118 in Roman numerals?
2118 in Roman numerals is MMCXVIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026