18578421359 has 2 divisors, whose sum is σ = 18578421360. Its totient is φ = 18578421358.

The previous prime is 18578421271. The next prime is 18578421383. The reversal of 18578421359 is 95312487581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18578421359 - 2²⁰ = 18577372783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18578421359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18578421859) 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 as a sum of consecutive naturals, namely, 9289210679 + 9289210680.

It is an arithmetic number, because the mean of its divisors is an integer number (9289210680).

Almost surely, 2^18578421359 is an apocalyptic number.

18578421359 is a deficient number, since it is larger than the sum of its proper divisors (1).

18578421359 is an equidigital number, since it uses as much as digits as its factorization.

18578421359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 53.

The spelling of 18578421359 in words is "eighteen billion, five hundred seventy-eight million, four hundred twenty-one thousand, three hundred fifty-nine".