Compare 20809 vs 20821

Property	20809	20821
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	20809¹	47¹ × 443¹
Prime factorization	20809	47 × 443
Divisors count	2	4
Divisors	1, 20809	1, 47, 443, 20821
Number of properties	5	1
Additive primes	1091st
Harmonic primes	859th
Primes	2344th
Pythagorean primes	1165th
Semiprimes		5283rd
Twin primes (2nd member)	355th
Roman numberals
Base 2	101000101001001₂	101000101010101₂
Base 3	1001112201₃	1001120011₃
Base 4	11011021₄	11011111₄
Base 5	1131214₅	1131241₅
Base 6	240201₆	240221₆
Base 7	114445₇	114463₇
Base 8	50511₈	50525₈
Base 9	31481₉	31504₉
Base 10	20809₁₀	20821₁₀
Base 11	146a8₁₁	14709₁₁
Base 12	10061₁₂	10071₁₂
Base 13	9619₁₃	9628₁₃
Base 14	7825₁₄	7833₁₄
Base 15	6274₁₅	6281₁₅
Base 16	5149₁₆	5155₁₆