Guppygandingan

Guppygandingan is equal to 1020,000,000,000,000 = E20,000,000,000,000. The term was coined by Sbiis Saibian. It is equal to 1 followed by 20 trillion zeros. It is 20,000,000,000,001 digits long.
Writing down the full decimal expansion would take 20,000,000 books of 400 pages each, with 2,500 digits on each page (except for the first, which would have 2,501).
== Names in -illion systems ==
In the short scale, it is also called:
According to Landon Curt Noll's The English name of a number, guppygandingan is also known as:
==Approximations==
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{20000000000000}\) 	\(1\times10^{20000000000000}\)
Arrow notation 	\(100\uparrow10\uparrow13\) 	\(100\uparrow10\uparrow13\)
Down-arrow notation 	\(378\downarrow\downarrow6\) 	\(145\downarrow\downarrow7\)
Steinhaus-Moser Notation 	11[3][3] 	12[3][3]
Copy notation 	1[1[14]] 	2[2[14]]
H* function 	H(6H(3)) 	H(7H(3))
Taro's multivariable Ackermann function	A(3,A(3,42)) 	A(3,A(3,43))
Pound-Star Notation 	#*((1))*(12)*5 	#*((1))*(75)*3
BEAF 	{100,{10,13}} 	{100,{10,13}}
Bashicu matrix system 	(0)(1)[6] 	(0)(1)[7]
Hyperfactorial array notation 	(15!)! 	(16!)!
Fast-growing hierarchy 	\(f_2(f_2(40))\) 	\(f_2(f_2(41))\)
Hardy hierarchy 	\(H_{\omega^22}(40)\) 	\(H_{\omega^22}(41)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{\omega+3}2}}(10)\)	\(g_{\omega^{\omega^{\omega+3}2}}(10)\)
== Sources ==
== See also ==
Category:Numbers
Category:Class 3
Category:Numbers by Sbiis Saibian
Category:Animal-based name
Category:Lower class 3