16681324 has 24 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 7484880.

The previous prime is 16681319. The next prime is 16681333. The reversal of 16681324 is 42318661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077 + ... + 5875.

It is an arithmetic number, because the mean of its divisors is an integer number (1344000).

Almost surely, 2^16681324 is an apocalyptic number.

It is an amenable number.

16681324 is a deficient number, since it is larger than the sum of its proper divisors (15574676).

16681324 is a wasteful number, since it uses less digits than its factorization.

16681324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893 (or 4891 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 16681324 is about 4084.2776595134. The cubic root of 16681324 is about 255.5113358762.

Adding to 16681324 its reverse (42318661), we get a palindrome (58999985).

It can be divided in two parts, 1668 and 1324, that added together give a palindrome (2992).

The spelling of 16681324 in words is "sixteen million, six hundred eighty-one thousand, three hundred twenty-four".