18579432973 has 2 divisors, whose sum is σ = 18579432974. Its totient is φ = 18579432972.

The previous prime is 18579432943. The next prime is 18579433001. The reversal of 18579432973 is 37923497581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15194753289 + 3384679684 = 123267^2 + 58178^2 .

It is an emirp because it is prime and its reverse (37923497581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18579432973 - 2¹⁷ = 18579301901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18579432943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9289716486 + 9289716487.

It is an arithmetic number, because the mean of its divisors is an integer number (9289716487).

Almost surely, 2^18579432973 is an apocalyptic number.

It is an amenable number.

18579432973 is a deficient number, since it is larger than the sum of its proper divisors (1).

18579432973 is an equidigital number, since it uses as much as digits as its factorization.

18579432973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 58.

The spelling of 18579432973 in words is "eighteen billion, five hundred seventy-nine million, four hundred thirty-two thousand, nine hundred seventy-three".