16919345 has 16 divisors (see below), whose sum is σ = 20742480. Its totient is φ = 13246464.

The previous prime is 16919327. The next prime is 16919381. The reversal of 16919345 is 54391961.

It can be written as a sum of positive squares in 8 ways, for example, as 43681 + 16875664 = 209^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 16919345 - 2⁶ = 16919281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16919299 and 16919308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85787 + ... + 85983.

It is an arithmetic number, because the mean of its divisors is an integer number (1296405).

Almost surely, 2^16919345 is an apocalyptic number.

It is an amenable number.

16919345 is a deficient number, since it is larger than the sum of its proper divisors (3823135).

16919345 is a wasteful number, since it uses less digits than its factorization.

16919345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484.

The product of its digits is 29160, while the sum is 38.

The square root of 16919345 is about 4113.3131414956. The cubic root of 16919345 is about 256.7208736542.

The spelling of 16919345 in words is "sixteen million, nine hundred nineteen thousand, three hundred forty-five".