18430249 has 2 divisors, whose sum is σ = 18430250. Its totient is φ = 18430248.

The previous prime is 18430231. The next prime is 18430271. The reversal of 18430249 is 94203481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18429849 + 400 = 4293^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 18430249 - 2⁷ = 18430121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18430249.

It is not a weakly prime, because it can be changed into another prime (18430229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9215124 + 9215125.

It is an arithmetic number, because the mean of its divisors is an integer number (9215125).

Almost surely, 2^18430249 is an apocalyptic number.

It is an amenable number.

18430249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18430249 is an equidigital number, since it uses as much as digits as its factorization.

18430249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18430249 is about 4293.0465872152. The cubic root of 18430249 is about 264.1458149554.

The spelling of 18430249 in words is "eighteen million, four hundred thirty thousand, two hundred forty-nine".