16993318 has 8 divisors (see below), whose sum is σ = 25724160. Its totient is φ = 8418600.

The previous prime is 16993313. The next prime is 16993321. The reversal of 16993318 is 81339961.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16993313) 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, 38758 + ... + 39193.

It is an arithmetic number, because the mean of its divisors is an integer number (3215520).

Almost surely, 2^16993318 is an apocalyptic number.

16993318 is a deficient number, since it is larger than the sum of its proper divisors (8730842).

16993318 is a wasteful number, since it uses less digits than its factorization.

16993318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78062.

The product of its digits is 34992, while the sum is 40.

The square root of 16993318 is about 4122.2952344537. The cubic root of 16993318 is about 257.0944658204.

The spelling of 16993318 in words is "sixteen million, nine hundred ninety-three thousand, three hundred eighteen".