18606816443 has 2 divisors, whose sum is σ = 18606816444. Its totient is φ = 18606816442.

The previous prime is 18606816433. The next prime is 18606816577. The reversal of 18606816443 is 34461860681.

It is a weak prime.

It is an emirp because it is prime and its reverse (34461860681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18606816443 - 2¹⁰ = 18606815419 is a prime.

It is not a weakly prime, because it can be changed into another prime (18606816433) 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, 9303408221 + 9303408222.

It is an arithmetic number, because the mean of its divisors is an integer number (9303408222).

Almost surely, 2^18606816443 is an apocalyptic number.

18606816443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18606816443 is an equidigital number, since it uses as much as digits as its factorization.

18606816443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 18606816443 in words is "eighteen billion, six hundred six million, eight hundred sixteen thousand, four hundred forty-three".