18081113737 has 2 divisors, whose sum is σ = 18081113738. Its totient is φ = 18081113736.

The previous prime is 18081113719. The next prime is 18081113777. The reversal of 18081113737 is 73731118081.

It is an a-pointer prime, because the next prime (18081113777) can be obtained adding 18081113737 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15794456976 + 2286656761 = 125676^2 + 47819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18081113737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18081113737.

It is not a weakly prime, because it can be changed into another prime (18081113707) 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, 9040556868 + 9040556869.

It is an arithmetic number, because the mean of its divisors is an integer number (9040556869).

Almost surely, 2^18081113737 is an apocalyptic number.

It is an amenable number.

18081113737 is a deficient number, since it is larger than the sum of its proper divisors (1).

18081113737 is an equidigital number, since it uses as much as digits as its factorization.

18081113737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 18081113737 in words is "eighteen billion, eighty-one million, one hundred thirteen thousand, seven hundred thirty-seven".