It's about as fast as The Space Shuttle.
It's about one-fifth as fast as a Meteor.
In other words, 23.3560 mach is 0.180 times the speed of a Meteor, and the speed of a Meteor is 5.60 times that amount.(formally Meteoroid or meteorite, depending on the context; a.k.a. "shooting star", a.k.a. "falling star")
Small meteoroids enter the Earth's atmosphere at speeds between 34 mach and 220 mach, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 8.40 mach.
It's about eight-and-a-half times as fast as a Bullet (Rifle).
In other words, 23.3560 mach is 8.460 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 0.1180 times that amount.(5.56 x 45 mm, a.k.a. 5.56 NATO)
A 5.56 x 45 mm cartridge is fired at a velocity of 2.760 mach. As the NATO rifle cartridge, it is used by the military forces of more than thirty-one countries, including use in the M16 series, M4 Carbine, HK-416, and M249 Squad automatic weapons used by the United States armed forces.
It's about twelve times as fast as a Jet Fighter.
It's about one-fifteenth as fast as a bolt of Lightning.
In other words, the speed of a bolt of Lightning is 13 times 23.3560 mach.(atmospheric electrical discharge)
A bolt of lightning can travel at up to 290 mach when arcing from the atmosphere to the Earth. An estimated 280 million lightning strikes strikes occur each year.
It's about twenty times as fast as a Bullet (Handgun).
In other words, 23.3560 mach is 20.20 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 0.0495 times that amount.(for .40 Smith & Wesson 135 grain Sierra JHP, VV 3N37 powder, Fed. 100 primer, Remington case) (muzzle velocity)
A 0.40 caliber Smith & Wesson bullet has a muzzle a velocity of 1.160 mach. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about twenty times as fast as The Speed of Sound.
In other words, 23.3560 mach is 22.60 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.0442 times that amount.(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 1.03 mach. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 4.520 mach to 4.710 mach in water, depending on its salinity.