18579568973 has 6 divisors (see below), whose sum is σ = 21612968046. Its totient is φ = 15925344792.

The previous prime is 18579568963. The next prime is 18579568999. The reversal of 18579568973 is 37986597581.

It can be written as a sum of positive squares in only one way, i.e., 17219213284 + 1360355689 = 131222^2 + 36883^2 .

It is not a de Polignac number, because 18579568973 - 2³⁴ = 1399699789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18579568963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189587390 + ... + 189587487.

It is an arithmetic number, because the mean of its divisors is an integer number (3602161341).

Almost surely, 2^18579568973 is an apocalyptic number.

It is an amenable number.

18579568973 is a deficient number, since it is larger than the sum of its proper divisors (3033399073).

18579568973 is an equidigital number, since it uses as much as digits as its factorization.

18579568973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379174891 (or 379174884 counting only the distinct ones).

The product of its digits is 114307200, while the sum is 68.

The spelling of 18579568973 in words is "eighteen billion, five hundred seventy-nine million, five hundred sixty-eight thousand, nine hundred seventy-three".