Compare 21820 vs 21821

Property	21820	21821
Type	composite number	prime
Unique factors	3	1
Total factors	4	1
Prime factorization	2² × 5¹ × 1091¹	21821¹
Prime factorization	2 × 2 × 5 × 1091	21821
Divisors count	12	2
Divisors	1, 2, 4, 5, 10, 20, 1091, 2182, 4364, 5455, 10910, 21820	1, 21821
Number of properties	0	6
Chen primes		1201st
Cousin primes (2nd member)		372nd
Isolated primes		1707th
Long primes		926th
Primes		2448th
Pythagorean primes		1215th
Roman numberals
Base 2	101010100111100₂	101010100111101₂
Base 3	1002221011₃	1002221012₃
Base 4	11110330₄	11110331₄
Base 5	1144240₅	1144241₅
Base 6	245004₆	245005₆
Base 7	120421₇	120422₇
Base 8	52474₈	52475₈
Base 9	32834₉	32835₉
Base 10	21820₁₀	21821₁₀
Base 11	15437₁₁	15438₁₁
Base 12	10764₁₂	10765₁₂
Base 13	9c16₁₃	9c17₁₃
Base 14	7d48₁₄	7d49₁₄
Base 15	66ea₁₅	66eb₁₅
Base 16	553c₁₆	553d₁₆