16894138 has 4 divisors (see below), whose sum is σ = 25341210. Its totient is φ = 8447068.

The previous prime is 16894127. The next prime is 16894139. The reversal of 16894138 is 83149861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83149861 = 449 ⋅185189.

It can be written as a sum of positive squares in only one way, i.e., 14953689 + 1940449 = 3867^2 + 1393^2 .

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 a self number, because there is not a number n which added to its sum of digits gives 16894138.

It is not an unprimeable number, because it can be changed into a prime (16894139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4223533 + ... + 4223536.

Almost surely, 2^16894138 is an apocalyptic number.

16894138 is a deficient number, since it is larger than the sum of its proper divisors (8447072).

16894138 is an equidigital number, since it uses as much as digits as its factorization.

16894138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447071.

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

The square root of 16894138 is about 4110.2479243958. The cubic root of 16894138 is about 256.5933198714.

The spelling of 16894138 in words is "sixteen million, eight hundred ninety-four thousand, one hundred thirty-eight".