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
- Binary
- 100001000110
- Octal
- 4106
- Hexadecimal
- 846
- Roman numeral
- MMCXVIII
- Scientific notation
- 2.118 × 10^3
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: 3 August 2026