18349830749 has 2 divisors, whose sum is σ = 18349830750. Its totient is φ = 18349830748.

The previous prime is 18349830743. The next prime is 18349830797. The reversal of 18349830749 is 94703894381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9587934724 + 8761896025 = 97918^2 + 93605^2 .

It is a cyclic number.

It is not a de Polignac number, because 18349830749 - 2¹² = 18349826653 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 18349830694 and 18349830703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18349830743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174915374 + 9174915375.

It is an arithmetic number, because the mean of its divisors is an integer number (9174915375).

Almost surely, 2^18349830749 is an apocalyptic number.

It is an amenable number.

18349830749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18349830749 is an equidigital number, since it uses as much as digits as its factorization.

18349830749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 18349830749 in words is "eighteen billion, three hundred forty-nine million, eight hundred thirty thousand, seven hundred forty-nine".