Árpád Kurusa
mathematician, associate professor
Department of Geometry
Bolyai Institute
Faculty of Science
University of Szeged


Árpád Kurusa

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2020

This note is about the number 2020 of this year.

Before the list comes observe that 2020 is not a prime number, because $2020=2^2*5*101$.

  • The date of February 02 is 02.02.2020, a palindrome.
  • $2020=1^23*4*(-5+6+7*8*9)$
  • $2020=9*8*7*(6-5)*4+3+2-1$
  • $2020=0^3+1^8+2^7-3^9+4^6+5^4+6^2+7^5+8^0+9^1$
  • $2020=2*(2*(22^2+22)-2)$
  • For any non-zero digit $a$: $2020=\frac{(aaaaa-a)*(a+a)}{aa*a}$

Source:2020 In Numbers: Mathematical Style - Revised


© 2020 Árpád Kurusa