16945686 has 40 divisors (see below), whose sum is σ = 39291120. Its totient is φ = 5452272.

The previous prime is 16945661. The next prime is 16945699. The reversal of 16945686 is 68654961.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2895 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (982278).

Almost surely, 2^16945686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16945686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19645560).

16945686 is an abundant number, since it is smaller than the sum of its proper divisors (22345434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16945686 is a wasteful number, since it uses less digits than its factorization.

16945686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650 (or 3641 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 16945686 is about 4116.5138163257. The cubic root of 16945686 is about 256.8540304690.

The spelling of 16945686 in words is "sixteen million, nine hundred forty-five thousand, six hundred eighty-six".