16745881 has 4 divisors (see below), whose sum is σ = 16842852. Its totient is φ = 16648912.

The previous prime is 16745879. The next prime is 16745891. The reversal of 16745881 is 18854761.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13801225 + 2944656 = 3715^2 + 1716^2 .

It is a cyclic number.

It is not a de Polignac number, because 16745881 - 2¹ = 16745879 is a prime.

It is a super-2 number, since 2×16745881² = 560849060932322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16745891) 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, 48226 + ... + 48571.

It is an arithmetic number, because the mean of its divisors is an integer number (4210713).

Almost surely, 2^16745881 is an apocalyptic number.

It is an amenable number.

16745881 is a deficient number, since it is larger than the sum of its proper divisors (96971).

16745881 is an equidigital number, since it uses as much as digits as its factorization.

16745881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96970.

The product of its digits is 53760, while the sum is 40.

The square root of 16745881 is about 4092.1731390546. The cubic root of 16745881 is about 255.8405226211.

The spelling of 16745881 in words is "sixteen million, seven hundred forty-five thousand, eight hundred eighty-one".