20373574421173 has 2 divisors, whose sum is σ = 20373574421174. Its totient is φ = 20373574421172.

The previous prime is 20373574421171. The next prime is 20373574421183. The reversal of 20373574421173 is 37112447537302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15563829790404 + 4809744630769 = 3945102^2 + 2193113^2 .

It is a cyclic number.

It is not a de Polignac number, because 20373574421173 - 2¹ = 20373574421171 is a prime.

Together with 20373574421171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20373574421171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186787210586 + 10186787210587.

It is an arithmetic number, because the mean of its divisors is an integer number (10186787210587).

Almost surely, 2^{20373574421173} is an apocalyptic number.

It is an amenable number.

20373574421173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373574421173 is an equidigital number, since it uses as much as digits as its factorization.

20373574421173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 49.

The spelling of 20373574421173 in words is "twenty trillion, three hundred seventy-three billion, five hundred seventy-four million, four hundred twenty-one thousand, one hundred seventy-three".