16684972 has 6 divisors (see below), whose sum is σ = 29198708. Its totient is φ = 8342484.

The previous prime is 16684963. The next prime is 16685017. The reversal of 16684972 is 27948661.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085618 + ... + 2085625.

Almost surely, 2^16684972 is an apocalyptic number.

It is an amenable number.

16684972 is a deficient number, since it is larger than the sum of its proper divisors (12513736).

16684972 is a wasteful number, since it uses less digits than its factorization.

16684972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171247 (or 4171245 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 16684972 is about 4084.7242256975. The cubic root of 16684972 is about 255.5299602455.

The spelling of 16684972 in words is "sixteen million, six hundred eighty-four thousand, nine hundred seventy-two".