18247648249 has 2 divisors, whose sum is σ = 18247648250. Its totient is φ = 18247648248.

The previous prime is 18247648229. The next prime is 18247648291. The reversal of 18247648249 is 94284674281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18179668224 + 67980025 = 134832^2 + 8245^2 .

It is a cyclic number.

It is not a de Polignac number, because 18247648249 - 2¹⁷ = 18247517177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18247648249.

It is not a weakly prime, because it can be changed into another prime (18247648219) 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, 9123824124 + 9123824125.

It is an arithmetic number, because the mean of its divisors is an integer number (9123824125).

Almost surely, 2^18247648249 is an apocalyptic number.

It is an amenable number.

18247648249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18247648249 is an equidigital number, since it uses as much as digits as its factorization.

18247648249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6193152, while the sum is 55.

The spelling of 18247648249 in words is "eighteen billion, two hundred forty-seven million, six hundred forty-eight thousand, two hundred forty-nine".