18343663 has 8 divisors (see below), whose sum is σ = 20917008. Its totient is φ = 15936384.

The previous prime is 18343639. The next prime is 18343669. The reversal of 18343663 is 36634381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18343663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343669) 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 in 7 ways as a sum of consecutive naturals, for example, 41281 + ... + 41722.

It is an arithmetic number, because the mean of its divisors is an integer number (2614626).

Almost surely, 2^18343663 is an apocalyptic number.

18343663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18343663 is a deficient number, since it is larger than the sum of its proper divisors (2573345).

18343663 is a wasteful number, since it uses less digits than its factorization.

18343663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83033.

The product of its digits is 31104, while the sum is 34.

The square root of 18343663 is about 4282.9502682147. The cubic root of 18343663 is about 263.7315098259.

The spelling of 18343663 in words is "eighteen million, three hundred forty-three thousand, six hundred sixty-three".