16474681 has 4 divisors (see below), whose sum is σ = 16483572. Its totient is φ = 16465792.

The previous prime is 16474663. The next prime is 16474721. The reversal of 16474681 is 18647461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10791225 + 5683456 = 3285^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 16474681 - 2¹¹ = 16472633 is a prime.

It is a super-2 number, since 2×16474681² = 542830228103522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16474681.

It is not an unprimeable number, because it can be changed into a prime (16474621) 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, 496 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (4120893).

Almost surely, 2^16474681 is an apocalyptic number.

It is an amenable number.

16474681 is a deficient number, since it is larger than the sum of its proper divisors (8891).

16474681 is an equidigital number, since it uses as much as digits as its factorization.

16474681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890.

The product of its digits is 32256, while the sum is 37.

The square root of 16474681 is about 4058.9014523637. The cubic root of 16474681 is about 254.4518843271.

It can be divided in two parts, 1647 and 4681, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 16474681 in words is "sixteen million, four hundred seventy-four thousand, six hundred eighty-one".