16856013 has 4 divisors (see below), whose sum is σ = 22474688. Its totient is φ = 11237340.

The previous prime is 16856011. The next prime is 16856017. The reversal of 16856013 is 31065861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16856013 - 2¹ = 16856011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856011) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2809333 + ... + 2809338.

It is an arithmetic number, because the mean of its divisors is an integer number (5618672).

Almost surely, 2^16856013 is an apocalyptic number.

It is an amenable number.

16856013 is a deficient number, since it is larger than the sum of its proper divisors (5618675).

16856013 is an equidigital number, since it uses as much as digits as its factorization.

16856013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5618674.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 16856013 is about 4105.6075068131. The cubic root of 16856013 is about 256.4001564523.

The spelling of 16856013 in words is "sixteen million, eight hundred fifty-six thousand, thirteen".