16811138 has 8 divisors (see below), whose sum is σ = 25240140. Its totient is φ = 8397760.

The previous prime is 16811131. The next prime is 16811153. The reversal of 16811138 is 83111861.

It can be written as a sum of positive squares in 2 ways, for example, as 13965169 + 2845969 = 3737^2 + 1687^2 .

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

It is a super-2 number, since 2×16811138² = 565228721710088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16811138.

It is not an unprimeable number, because it can be changed into a prime (16811131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683 + ... + 5838.

Almost surely, 2^16811138 is an apocalyptic number.

16811138 is a deficient number, since it is larger than the sum of its proper divisors (8429002).

16811138 is a wasteful number, since it uses less digits than its factorization.

16811138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7812.

The product of its digits is 1152, while the sum is 29.

The square root of 16811138 is about 4100.1387781391. The cubic root of 16811138 is about 256.1724200605.

Adding to 16811138 its reverse (83111861), we get a palindrome (99922999).

The spelling of 16811138 in words is "sixteen million, eight hundred eleven thousand, one hundred thirty-eight".