16681853 has 4 divisors (see below), whose sum is σ = 16955388. Its totient is φ = 16408320.

The previous prime is 16681849. The next prime is 16681897. The reversal of 16681853 is 35818661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35818661 = 167 ⋅214483.

It can be written as a sum of positive squares in 2 ways, for example, as 1951609 + 14730244 = 1397^2 + 3838^2 .

It is a cyclic number.

It is not a de Polignac number, because 16681853 - 2² = 16681849 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 (16681823) 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, 136676 + ... + 136797.

It is an arithmetic number, because the mean of its divisors is an integer number (4238847).

Almost surely, 2^16681853 is an apocalyptic number.

It is an amenable number.

16681853 is a deficient number, since it is larger than the sum of its proper divisors (273535).

16681853 is an equidigital number, since it uses as much as digits as its factorization.

16681853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273534.

The product of its digits is 34560, while the sum is 38.

The square root of 16681853 is about 4084.3424195334. The cubic root of 16681853 is about 255.5140367823.

The spelling of 16681853 in words is "sixteen million, six hundred eighty-one thousand, eight hundred fifty-three".