18663343 has 4 divisors (see below), whose sum is σ = 18680328. Its totient is φ = 18646360.

The previous prime is 18663341. The next prime is 18663347. The reversal of 18663343 is 34336681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18663343 - 2¹ = 18663341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18663299 and 18663308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18663341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6721 + ... + 9082.

It is an arithmetic number, because the mean of its divisors is an integer number (4670082).

Almost surely, 2^18663343 is an apocalyptic number.

18663343 is a deficient number, since it is larger than the sum of its proper divisors (16985).

18663343 is a wasteful number, since it uses less digits than its factorization.

18663343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16984.

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

The square root of 18663343 is about 4320.1091421398. The cubic root of 18663343 is about 265.2547354731.

The spelling of 18663343 in words is "eighteen million, six hundred sixty-three thousand, three hundred forty-three".