16893418 has 4 divisors (see below), whose sum is σ = 25340130. Its totient is φ = 8446708.

The previous prime is 16893403. The next prime is 16893421. The reversal of 16893418 is 81439861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81439861 = 47 ⋅1732763.

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 4524129 = 3517^2 + 2127^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4223353 + ... + 4223356.

Almost surely, 2^16893418 is an apocalyptic number.

16893418 is a deficient number, since it is larger than the sum of its proper divisors (8446712).

16893418 is an equidigital number, since it uses as much as digits as its factorization.

16893418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8446711.

The product of its digits is 41472, while the sum is 40.

The square root of 16893418 is about 4110.1603375051. The cubic root of 16893418 is about 256.5896746264.

The spelling of 16893418 in words is "sixteen million, eight hundred ninety-three thousand, four hundred eighteen".