16681383 has 20 divisors (see below), whose sum is σ = 25531968. Its totient is φ = 10847520.

The previous prime is 16681363. The next prime is 16681397. The reversal of 16681383 is 38318661.

It is not a de Polignac number, because 16681383 - 2⁶ = 16681319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681333) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 810 + ... + 5832.

Almost surely, 2^16681383 is an apocalyptic number.

16681383 is a deficient number, since it is larger than the sum of its proper divisors (8850585).

16681383 is an equidigital number, since it uses as much as digits as its factorization.

16681383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076 (or 5067 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16681383 is about 4084.2848823264. The cubic root of 16681383 is about 255.5116371143.

The spelling of 16681383 in words is "sixteen million, six hundred eighty-one thousand, three hundred eighty-three".