16981144 has 16 divisors (see below), whose sum is σ = 32380200. Its totient is φ = 8346432.

The previous prime is 16981127. The next prime is 16981157. The reversal of 16981144 is 44118961.

It is a congruent number.

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, 17517 + ... + 18460.

Almost surely, 2^16981144 is an apocalyptic number.

It is an amenable number.

16981144 is a deficient number, since it is larger than the sum of its proper divisors (15399056).

16981144 is a wasteful number, since it uses less digits than its factorization.

16981144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36042 (or 36038 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 16981144 is about 4120.8183653250. The cubic root of 16981144 is about 257.0330570609.

The spelling of 16981144 in words is "sixteen million, nine hundred eighty-one thousand, one hundred forty-four".