16945019 has 16 divisors (see below), whose sum is σ = 21577920. Its totient is φ = 12942720.

The previous prime is 16944973. The next prime is 16945021. The reversal of 16945019 is 91054961.

It is not a de Polignac number, because 16945019 - 2¹² = 16940923 is a prime.

It is a super-2 number, since 2×16945019² = 574267337820722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16945019.

It is not an unprimeable number, because it can be changed into a prime (16945079) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 572 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (1348620).

Almost surely, 2^16945019 is an apocalyptic number.

16945019 is a deficient number, since it is larger than the sum of its proper divisors (4632901).

16945019 is a wasteful number, since it uses less digits than its factorization.

16945019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 16945019 is about 4116.4328003746. The cubic root of 16945019 is about 256.8506604099.

The spelling of 16945019 in words is "sixteen million, nine hundred forty-five thousand, nineteen".