18430243 has 8 divisors (see below), whose sum is σ = 20185200. Its totient is φ = 16723488.

The previous prime is 18430231. The next prime is 18430249. The reversal of 18430243 is 34203481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18430243 - 2⁹ = 18429731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18430249) 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 in 7 ways as a sum of consecutive naturals, for example, 11248 + ... + 12781.

It is an arithmetic number, because the mean of its divisors is an integer number (2523150).

Almost surely, 2^18430243 is an apocalyptic number.

18430243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18430243 is a deficient number, since it is larger than the sum of its proper divisors (1754957).

18430243 is a wasteful number, since it uses less digits than its factorization.

18430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24101.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 18430243 is about 4293.0458884107. The cubic root of 18430243 is about 264.1457862910.

The spelling of 18430243 in words is "eighteen million, four hundred thirty thousand, two hundred forty-three".