16686243 has 20 divisors (see below), whose sum is σ = 28488240. Its totient is φ = 9534672.

The previous prime is 16686227. The next prime is 16686251. The reversal of 16686243 is 34268661.

It is not a de Polignac number, because 16686243 - 2⁴ = 16686227 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16686198 and 16686207.

It is not an unprimeable number, because it can be changed into a prime (16686253) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14148 + ... + 15281.

It is an arithmetic number, because the mean of its divisors is an integer number (1424412).

Almost surely, 2^16686243 is an apocalyptic number.

16686243 is a deficient number, since it is larger than the sum of its proper divisors (11801997).

16686243 is an equidigital number, since it uses as much as digits as its factorization.

16686243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29448 (or 29439 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 16686243 is about 4084.8798023932. The cubic root of 16686243 is about 255.5364485260.

The spelling of 16686243 in words is "sixteen million, six hundred eighty-six thousand, two hundred forty-three".