16685423 has 4 divisors (see below), whose sum is σ = 17040480. Its totient is φ = 16330368.

The previous prime is 16685413. The next prime is 16685437. The reversal of 16685423 is 32458661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32458661 = 17 ⋅1909333.

It is a cyclic number.

It is not a de Polignac number, because 16685423 - 2⁶ = 16685359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16685413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177458 + ... + 177551.

It is an arithmetic number, because the mean of its divisors is an integer number (4260120).

Almost surely, 2^16685423 is an apocalyptic number.

16685423 is a deficient number, since it is larger than the sum of its proper divisors (355057).

16685423 is an equidigital number, since it uses as much as digits as its factorization.

16685423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355056.

The product of its digits is 34560, while the sum is 35.

The square root of 16685423 is about 4084.7794310097. The cubic root of 16685423 is about 255.5322625763.

The spelling of 16685423 in words is "sixteen million, six hundred eighty-five thousand, four hundred twenty-three".