21600373793 has 2 divisors, whose sum is σ = 21600373794. Its totient is φ = 21600373792.

The previous prime is 21600373733. The next prime is 21600373831. The reversal of 21600373793 is 39737300612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21131564689 + 468809104 = 145367^2 + 21652^2 .

It is a cyclic number.

It is not a de Polignac number, because 21600373793 - 2¹⁰ = 21600372769 is a prime.

It is a super-2 number, since 2×21600373793² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21600373793.

It is not a weakly prime, because it can be changed into another prime (21600373733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10800186896 + 10800186897.

It is an arithmetic number, because the mean of its divisors is an integer number (10800186897).

Almost surely, 2^21600373793 is an apocalyptic number.

It is an amenable number.

21600373793 is a deficient number, since it is larger than the sum of its proper divisors (1).

21600373793 is an equidigital number, since it uses as much as digits as its factorization.

21600373793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 41.

The spelling of 21600373793 in words is "twenty-one billion, six hundred million, three hundred seventy-three thousand, seven hundred ninety-three".