16682381 has 2 divisors, whose sum is σ = 16682382. Its totient is φ = 16682380.

The previous prime is 16682359. The next prime is 16682401. The reversal of 16682381 is 18328661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 320356 = 4045^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 16682381 - 2⁶ = 16682317 is a prime.

It is a super-2 number, since 2×16682381² = 556603671658322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16682311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8341190 + 8341191.

It is an arithmetic number, because the mean of its divisors is an integer number (8341191).

Almost surely, 2^16682381 is an apocalyptic number.

It is an amenable number.

16682381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16682381 is an equidigital number, since it uses as much as digits as its factorization.

16682381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 16682381 is about 4084.4070561099. The cubic root of 16682381 is about 255.5167325258.

The spelling of 16682381 in words is "sixteen million, six hundred eighty-two thousand, three hundred eighty-one".