18548260889 has 2 divisors, whose sum is σ = 18548260890. Its totient is φ = 18548260888.

The previous prime is 18548260853. The next prime is 18548260891. The reversal of 18548260889 is 98806284581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18548260864 + 25 = 136192^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18548260889 is a prime.

Together with 18548260891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18548263889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274130444 + 9274130445.

It is an arithmetic number, because the mean of its divisors is an integer number (9274130445).

Almost surely, 2^18548260889 is an apocalyptic number.

It is an amenable number.

18548260889 is a deficient number, since it is larger than the sum of its proper divisors (1).

18548260889 is an equidigital number, since it uses as much as digits as its factorization.

18548260889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 18548260889 in words is "eighteen billion, five hundred forty-eight million, two hundred sixty thousand, eight hundred eighty-nine".