16990986 has 16 divisors (see below), whose sum is σ = 34145568. Its totient is φ = 5636400.

The previous prime is 16990913. The next prime is 16990993. The reversal of 16990986 is 68909961.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5445 + ... + 7976.

It is an arithmetic number, because the mean of its divisors is an integer number (2134098).

Almost surely, 2^16990986 is an apocalyptic number.

16990986 is an abundant number, since it is smaller than the sum of its proper divisors (17154582).

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

16990986 is a wasteful number, since it uses less digits than its factorization.

16990986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13637.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 16990986 is about 4122.0123726161. The cubic root of 16990986 is about 257.0827048894.

The spelling of 16990986 in words is "sixteen million, nine hundred ninety thousand, nine hundred eighty-six".