22
22是21搭23之间个自然数。
- 第13个合数，正约数有1、2、11搭22。前一个为21、下一个为24。
- 第2个十进制个史密夫数。前一个为4、下一个为27。
- 钛个原子序数。
- SSH个默认端口号。
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