16939645 has 8 divisors (see below), whose sum is σ = 20450304. Its totient is φ = 13469904.

The previous prime is 16939631. The next prime is 16939669. The reversal of 16939645 is 54693961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16939645 - 2⁵ = 16939613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9309 + ... + 10978.

It is an arithmetic number, because the mean of its divisors is an integer number (2556288).

Almost surely, 2^16939645 is an apocalyptic number.

It is an amenable number.

16939645 is a deficient number, since it is larger than the sum of its proper divisors (3510659).

16939645 is a wasteful number, since it uses less digits than its factorization.

16939645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20459.

The product of its digits is 174960, while the sum is 43.

The square root of 16939645 is about 4115.7799989795. The cubic root of 16939645 is about 256.8235047131.

The spelling of 16939645 in words is "sixteen million, nine hundred thirty-nine thousand, six hundred forty-five".