16690345 has 16 divisors (see below), whose sum is σ = 24236928. Its totient is φ = 10771200.

The previous prime is 16690343. The next prime is 16690361. The reversal of 16690345 is 54309661.

It is not a de Polignac number, because 16690345 - 2¹ = 16690343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16690345.

It is not an unprimeable number, because it can be changed into a prime (16690343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13431 + ... + 14620.

It is an arithmetic number, because the mean of its divisors is an integer number (1514808).

Almost surely, 2^16690345 is an apocalyptic number.

It is an amenable number.

16690345 is a deficient number, since it is larger than the sum of its proper divisors (7546583).

16690345 is a wasteful number, since it uses less digits than its factorization.

16690345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28080.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 16690345 is about 4085.3818670964. The cubic root of 16690345 is about 255.5573864253.

The spelling of 16690345 in words is "sixteen million, six hundred ninety thousand, three hundred forty-five".