18041267789 has 2 divisors, whose sum is σ = 18041267790. Its totient is φ = 18041267788.

The previous prime is 18041267737. The next prime is 18041267791. The reversal of 18041267789 is 98776214081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16907800900 + 1133466889 = 130030^2 + 33667^2 .

It is a cyclic number.

It is not a de Polignac number, because 18041267789 - 2¹² = 18041263693 is a prime.

It is a Sophie Germain prime.

Together with 18041267791, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18041267789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18041267719) 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, 9020633894 + 9020633895.

It is an arithmetic number, because the mean of its divisors is an integer number (9020633895).

Almost surely, 2^18041267789 is an apocalyptic number.

It is an amenable number.

18041267789 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041267789 is an equidigital number, since it uses as much as digits as its factorization.

18041267789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 18041267789 in words is "eighteen billion, forty-one million, two hundred sixty-seven thousand, seven hundred eighty-nine".