Compare 201818 vs 201821

Property	201818	201821
Type	composite number	prime
Unique factors	4	1
Total factors	4	1
Prime factorization	2¹ × 19¹ × 47¹ × 113¹	201821¹
Prime factorization	2 × 19 × 47 × 113	201821
Divisors count	16	2
Divisors	1, 2, 19, 38, 47, 94, 113, 226, 893, 1786, 2147, 4294, 5311, 10622, 100909, 201818	1, 201821
Number of properties	0	10
Chen primes		7581st
Long primes		6796th
Primes		18129th
Prime quadruplets (1st member)		54th
Prime quintuplet 2s (1st member)		15th
Prime triplets (1st member)		844th
Pythagorean primes		9050th
Sexy primes (1st member)		4326th
Sexy prime triplets (1st member)		870th
Twin primes (1st member)		2172nd
Roman numberals
Base 2	110001010001011010₂	110001010001011101₂
Base 3	101020211202₃	101020211212₃
Base 4	301101122₄	301101131₄
Base 5	22424233₅	22424241₅
Base 6	4154202₆	4154205₆
Base 7	1500251₇	1500254₇
Base 8	612132₈	612135₈
Base 9	336752₉	336755₉
Base 10	201818₁₀	201821₁₀
Base 11	1286a1₁₁	1286a4₁₁
Base 12	98962₁₂	98965₁₂
Base 13	70b26₁₃	70b29₁₃
Base 14	53798₁₄	5379b₁₄
Base 15	3ebe8₁₅	3ebeb₁₅
Base 16	3145a₁₆	3145d₁₆