16806419 has 4 divisors (see below), whose sum is σ = 19207344. Its totient is φ = 14405496.

The previous prime is 16806403. The next prime is 16806443. The reversal of 16806419 is 91460861.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16806419 - 2⁴ = 16806403 is a prime.

It is a super-2 number, since 2×16806419² = 564911439207122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16806479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200452 + ... + 1200465.

It is an arithmetic number, because the mean of its divisors is an integer number (4801836).

Almost surely, 2^16806419 is an apocalyptic number.

16806419 is a deficient number, since it is larger than the sum of its proper divisors (2400925).

16806419 is an equidigital number, since it uses as much as digits as its factorization.

16806419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400924.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 16806419 is about 4099.5632694227. The cubic root of 16806419 is about 256.1484480410.

The spelling of 16806419 in words is "sixteen million, eight hundred six thousand, four hundred nineteen".