16987816 has 16 divisors (see below), whose sum is σ = 32032800. Its totient is φ = 8445744.

The previous prime is 16987807. The next prime is 16987853. The reversal of 16987816 is 61878961.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4500 + ... + 7363.

It is an arithmetic number, because the mean of its divisors is an integer number (2002050).

Almost surely, 2^16987816 is an apocalyptic number.

It is an amenable number.

16987816 is a deficient number, since it is larger than the sum of its proper divisors (15044984).

16987816 is a wasteful number, since it uses less digits than its factorization.

16987816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048 (or 12044 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 16987816 is about 4121.6278337569. The cubic root of 16987816 is about 257.0667159632.

The spelling of 16987816 in words is "sixteen million, nine hundred eighty-seven thousand, eight hundred sixteen".