16940345 has 4 divisors (see below), whose sum is σ = 20328420. Its totient is φ = 13552272.

The previous prime is 16940327. The next prime is 16940369. The reversal of 16940345 is 54304961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54304961 = 107 ⋅507523.

It can be written as a sum of positive squares in 2 ways, for example, as 1784896 + 15155449 = 1336^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 16940345 - 2⁶ = 16940281 is a prime.

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, 1694030 + ... + 1694039.

It is an arithmetic number, because the mean of its divisors is an integer number (5082105).

Almost surely, 2^16940345 is an apocalyptic number.

It is an amenable number.

16940345 is a deficient number, since it is larger than the sum of its proper divisors (3388075).

16940345 is an equidigital number, since it uses as much as digits as its factorization.

16940345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388074.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 16940345 is about 4115.8650366600. The cubic root of 16940345 is about 256.8270422524.

The spelling of 16940345 in words is "sixteen million, nine hundred forty thousand, three hundred forty-five".