16826881 has 4 divisors (see below), whose sum is σ = 17000452. Its totient is φ = 16653312.

The previous prime is 16826879. The next prime is 16826941. The reversal of 16826881 is 18862861.

16826881 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18862861 = 101 ⋅186761.

It can be written as a sum of positive squares in 2 ways, for example, as 2265025 + 14561856 = 1505^2 + 3816^2 .

It is a cyclic number.

It is not a de Polignac number, because 16826881 - 2¹ = 16826879 is a prime.

It is a super-2 number, since 2×16826881² = 566287848376322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16826681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86640 + ... + 86833.

It is an arithmetic number, because the mean of its divisors is an integer number (4250113).

Almost surely, 2^16826881 is an apocalyptic number.

It is an amenable number.

16826881 is a deficient number, since it is larger than the sum of its proper divisors (173571).

16826881 is an equidigital number, since it uses as much as digits as its factorization.

16826881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173570.

The product of its digits is 36864, while the sum is 40.

The square root of 16826881 is about 4102.0581419575. The cubic root of 16826881 is about 256.2523603986.

The spelling of 16826881 in words is "sixteen million, eight hundred twenty-six thousand, eight hundred eighty-one".