16691044 has 12 divisors (see below), whose sum is σ = 30746800. Its totient is φ = 7906248.

The previous prime is 16691039. The next prime is 16691053. The reversal of 16691044 is 44019661.

It is a junction number, because it is equal to n+sod(n) for n = 16690997 and 16691015.

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, 109734 + ... + 109885.

Almost surely, 2^16691044 is an apocalyptic number.

It is an amenable number.

16691044 is a deficient number, since it is larger than the sum of its proper divisors (14055756).

16691044 is a wasteful number, since it uses less digits than its factorization.

16691044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219642 (or 219640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 16691044 is about 4085.4674151191. The cubic root of 16691044 is about 255.5609539992.

The spelling of 16691044 in words is "sixteen million, six hundred ninety-one thousand, forty-four".