16712381 has 24 divisors (see below), whose sum is σ = 21204000. Its totient is φ = 13081824.

The previous prime is 16712359. The next prime is 16712383. The reversal of 16712381 is 18321761.

It is a de Polignac number, because none of the positive numbers 2^k-16712381 is a prime.

It is a super-2 number, since 2×16712381² = 558607357378322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16712383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26690 + ... + 27308.

It is an arithmetic number, because the mean of its divisors is an integer number (883500).

Almost surely, 2^16712381 is an apocalyptic number.

It is an amenable number.

16712381 is a deficient number, since it is larger than the sum of its proper divisors (4491619).

16712381 is a wasteful number, since it uses less digits than its factorization.

16712381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 674 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 16712381 is about 4088.0779102165. The cubic root of 16712381 is about 255.6698064303.

The spelling of 16712381 in words is "sixteen million, seven hundred twelve thousand, three hundred eighty-one".