16856018 has 8 divisors (see below), whose sum is σ = 26155980. Its totient is φ = 8137360.

The previous prime is 16856017. The next prime is 16856023. The reversal of 16856018 is 81065861.

It can be written as a sum of positive squares in 2 ways, for example, as 14462809 + 2393209 = 3803^2 + 1547^2 .

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

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145253 + ... + 145368.

Almost surely, 2^16856018 is an apocalyptic number.

16856018 is a deficient number, since it is larger than the sum of its proper divisors (9299962).

16856018 is a wasteful number, since it uses less digits than its factorization.

16856018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290652.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 16856018 is about 4105.6081157363. The cubic root of 16856018 is about 256.4001818043.

The spelling of 16856018 in words is "sixteen million, eight hundred fifty-six thousand, eighteen".