18943336 has 16 divisors (see below), whose sum is σ = 35705700. Its totient is φ = 9421824.

The previous prime is 18943291. The next prime is 18943357. The reversal of 18943336 is 63334981.

It can be written as a sum of positive squares in 2 ways, for example, as 18576100 + 367236 = 4310^2 + 606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18943295 and 18943304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4591 + ... + 7678.

Almost surely, 2^18943336 is an apocalyptic number.

It is an amenable number.

18943336 is a deficient number, since it is larger than the sum of its proper divisors (16762364).

18943336 is a wasteful number, since it uses less digits than its factorization.

18943336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12468 (or 12464 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 18943336 is about 4352.3942836099. The cubic root of 18943336 is about 266.5746335186.

The spelling of 18943336 in words is "eighteen million, nine hundred forty-three thousand, three hundred thirty-six".