Vigesimal-guppy

A vigesimal-guppy is equal to 2020 = 104,857,600,000,000,000,000,000,000 or approximately 104.9 septillion in short scale. The term was coined by Sbiis Saibian. It is also called "fztwenty" using the fz- prefix. It is 27 digits long.
==Etymology==
The 2 parts of the name "vigesimal-guppy", "vigesimal" and "guppy", mean base 20 and 2020 (in this base), which form 2020 when concentrated from left to right.
The 2 parts of the name "fztwenty", "fz" and "twenty", mean the function to the power of itself and 20, which form 2020 when concentrated from left to right.
== Approximations ==
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1.048\times10^{26}\) 	\(1.049\times10^{26}\)
Arrow notation 	\(20\uparrow\uparrow2\) 	\(20\uparrow\uparrow2\)
Steinhaus-Moser Notation 	20[3] 	20[3]
Copy notation 	9[26] 	1[27]
Taro's multivariable Ackermann function	A(3,83) 	A(3,84)
Pound-Star Notation 	#*(15)*21 	#*(1,5,2,6)*5
BEAF 	{20,2,2} 	{20,2,2}
Extensible-E 	1E26 	2E26
Bashicu matrix system 	(0)(0)(0)[1788] 	(0)(0)(0)[1789]
Hyperfactorial array notation 	25! 	26!
Fast-growing hierarchy 	\(f_2(80)\) 	\(f_2(81)\)
Hardy hierarchy 	\(H_{\omega^2}(80)\) 	\(H_{\omega^2}(81)\)
Slow-growing hierarchy 	\(g_{\omega^\omega}(20)\)	\(g_{\omega^\omega}(20)\)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Numbers by Sbiis Saibian
Category:Numbers with 7 to 29 digits
Category:Powers of 20
Category:Animal-based name
Category:Fz-
Category:Guppy regiment