18683943 has 16 divisors (see below), whose sum is σ = 25491840. Its totient is φ = 12168864.

The previous prime is 18683941. The next prime is 18683953. The reversal of 18683943 is 34938681.

It is a happy number.

It is not a de Polignac number, because 18683943 - 2¹ = 18683941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18683895 and 18683904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18683941) 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 15 ways as a sum of consecutive naturals, for example, 49905 + ... + 50277.

It is an arithmetic number, because the mean of its divisors is an integer number (1593240).

Almost surely, 2^18683943 is an apocalyptic number.

18683943 is a deficient number, since it is larger than the sum of its proper divisors (6807897).

18683943 is a wasteful number, since it uses less digits than its factorization.

18683943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718.

The product of its digits is 124416, while the sum is 42.

The square root of 18683943 is about 4322.4926836260. The cubic root of 18683943 is about 265.3522928143.

The spelling of 18683943 in words is "eighteen million, six hundred eighty-three thousand, nine hundred forty-three".