18310249 has 2 divisors, whose sum is σ = 18310250. Its totient is φ = 18310248.

The previous prime is 18310247. The next prime is 18310283. The reversal of 18310249 is 94201381.

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., 9859600 + 8450649 = 3140^2 + 2907^2 .

It is a cyclic number.

It is not a de Polignac number, because 18310249 - 2¹ = 18310247 is a prime.

Together with 18310247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18310247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9155124 + 9155125.

It is an arithmetic number, because the mean of its divisors is an integer number (9155125).

Almost surely, 2^18310249 is an apocalyptic number.

It is an amenable number.

18310249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18310249 is an equidigital number, since it uses as much as digits as its factorization.

18310249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18310249 is about 4279.0476744248. The cubic root of 18310249 is about 263.5712786368.

The spelling of 18310249 in words is "eighteen million, three hundred ten thousand, two hundred forty-nine".