18080185843 has 2 divisors, whose sum is σ = 18080185844. Its totient is φ = 18080185842.

The previous prime is 18080185819. The next prime is 18080185847. The reversal of 18080185843 is 34858108081.

It is a strong prime.

It is an emirp because it is prime and its reverse (34858108081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18080185843 - 2¹⁷ = 18080054771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18080185793 and 18080185802.

It is not a weakly prime, because it can be changed into another prime (18080185847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040092921 + 9040092922.

It is an arithmetic number, because the mean of its divisors is an integer number (9040092922).

Almost surely, 2^18080185843 is an apocalyptic number.

18080185843 is a deficient number, since it is larger than the sum of its proper divisors (1).

18080185843 is an equidigital number, since it uses as much as digits as its factorization.

18080185843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 18080185843 in words is "eighteen billion, eighty million, one hundred eighty-five thousand, eight hundred forty-three".