16680019 has 2 divisors, whose sum is σ = 16680020. Its totient is φ = 16680018.

The previous prime is 16679987. The next prime is 16680029. The reversal of 16680019 is 91008661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16680019 - 2⁵ = 16679987 is a prime.

It is a super-2 number, since 2×16680019² = 556446067680722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16680029) 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 as a sum of consecutive naturals, namely, 8340009 + 8340010.

It is an arithmetic number, because the mean of its divisors is an integer number (8340010).

Almost surely, 2^16680019 is an apocalyptic number.

16680019 is a deficient number, since it is larger than the sum of its proper divisors (1).

16680019 is an equidigital number, since it uses as much as digits as its factorization.

16680019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 16680019 is about 4084.1178974168. The cubic root of 16680019 is about 255.5046727163.

The spelling of 16680019 in words is "sixteen million, six hundred eighty thousand, nineteen".