16681838 has 8 divisors (see below), whose sum is σ = 25324488. Its totient is φ = 8240344.

The previous prime is 16681823. The next prime is 16681843. The reversal of 16681838 is 83818661.

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

It is a junction number, because it is equal to n+sod(n) for n = 16681795 and 16681804.

It is a congruent number.

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, 50081 + ... + 50412.

It is an arithmetic number, because the mean of its divisors is an integer number (3165561).

Almost surely, 2^16681838 is an apocalyptic number.

16681838 is a deficient number, since it is larger than the sum of its proper divisors (8642650).

16681838 is a wasteful number, since it uses less digits than its factorization.

16681838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100578.

The product of its digits is 55296, while the sum is 41.

The square root of 16681838 is about 4084.3405832521. The cubic root of 16681838 is about 255.5139601978.

The spelling of 16681838 in words is "sixteen million, six hundred eighty-one thousand, eight hundred thirty-eight".