21920725350573 has 8 divisors (see below), whose sum is σ = 33403010058048. Its totient is φ = 12526128771744.

The previous prime is 21920725350539. The next prime is 21920725350599. The reversal of 21920725350573 is 37505352702912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21920725350573 - 2⁶ = 21920725350509 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21920725390573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521922032136 + ... + 521922032177.

It is an arithmetic number, because the mean of its divisors is an integer number (4175376257256).

Almost surely, 2^{21920725350573} is an apocalyptic number.

It is an amenable number.

21920725350573 is a deficient number, since it is larger than the sum of its proper divisors (11482284707475).

21920725350573 is a wasteful number, since it uses less digits than its factorization.

21920725350573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043844064323.

The product of its (nonzero) digits is 3969000, while the sum is 51.

The spelling of 21920725350573 in words is "twenty-one trillion, nine hundred twenty billion, seven hundred twenty-five million, three hundred fifty thousand, five hundred seventy-three".