18130349 has 2 divisors, whose sum is σ = 18130350. Its totient is φ = 18130348.

The previous prime is 18130309. The next prime is 18130361. The reversal of 18130349 is 94303181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14577124 + 3553225 = 3818^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 18130349 - 2⁸ = 18130093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18130309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9065174 + 9065175.

It is an arithmetic number, because the mean of its divisors is an integer number (9065175).

Almost surely, 2^18130349 is an apocalyptic number.

It is an amenable number.

18130349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18130349 is an equidigital number, since it uses as much as digits as its factorization.

18130349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18130349 is about 4257.9747533305. The cubic root of 18130349 is about 262.7052314891.

The spelling of 18130349 in words is "eighteen million, one hundred thirty thousand, three hundred forty-nine".