16826681 has 2 divisors, whose sum is σ = 16826682. Its totient is φ = 16826680.

The previous prime is 16826659. The next prime is 16826683. The reversal of 16826681 is 18662861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 5664400 = 3341^2 + 2380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16826681 is a prime.

It is a super-2 number, since 2×16826681² = 566274386951522, which contains 22 as substring.

Together with 16826683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16826683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8413340 + 8413341.

It is an arithmetic number, because the mean of its divisors is an integer number (8413341).

Almost surely, 2^16826681 is an apocalyptic number.

It is an amenable number.

16826681 is a deficient number, since it is larger than the sum of its proper divisors (1).

16826681 is an equidigital number, since it uses as much as digits as its factorization.

16826681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 16826681 is about 4102.0337638786. The cubic root of 16826681 is about 256.2513451446.

The spelling of 16826681 in words is "sixteen million, eight hundred twenty-six thousand, six hundred eighty-one".