16681888 has 12 divisors (see below), whose sum is σ = 32842530. Its totient is φ = 8340928.

The previous prime is 16681849. The next prime is 16681897. The reversal of 16681888 is 88818661.

It can be written as a sum of positive squares in only one way, i.e., 8456464 + 8225424 = 2908^2 + 2868^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260623 + ... + 260686.

Almost surely, 2^16681888 is an apocalyptic number.

It is an amenable number.

16681888 is a deficient number, since it is larger than the sum of its proper divisors (16160642).

16681888 is an equidigital number, since it uses as much as digits as its factorization.

16681888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521319 (or 521311 counting only the distinct ones).

The product of its digits is 147456, while the sum is 46.

The square root of 16681888 is about 4084.3467041866. The cubic root of 16681888 is about 255.5142154792.

The spelling of 16681888 in words is "sixteen million, six hundred eighty-one thousand, eight hundred eighty-eight".