18768382249 has 2 divisors, whose sum is σ = 18768382250. Its totient is φ = 18768382248.

The previous prime is 18768382223. The next prime is 18768382277. The reversal of 18768382249 is 94228386781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12195226624 + 6573155625 = 110432^2 + 81075^2 .

It is an emirp because it is prime and its reverse (94228386781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18768382249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18768382193 and 18768382202.

It is not a weakly prime, because it can be changed into another prime (18768382289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9384191124 + 9384191125.

It is an arithmetic number, because the mean of its divisors is an integer number (9384191125).

Almost surely, 2^18768382249 is an apocalyptic number.

It is an amenable number.

18768382249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18768382249 is an equidigital number, since it uses as much as digits as its factorization.

18768382249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 58.

The spelling of 18768382249 in words is "eighteen billion, seven hundred sixty-eight million, three hundred eighty-two thousand, two hundred forty-nine".