16821768 has 16 divisors (see below), whose sum is σ = 42054480. Its totient is φ = 5607248.

The previous prime is 16821733. The next prime is 16821773. The reversal of 16821768 is 86712861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350430 + ... + 350477.

It is an arithmetic number, because the mean of its divisors is an integer number (2628405).

Almost surely, 2^16821768 is an apocalyptic number.

It is an amenable number.

16821768 is an abundant number, since it is smaller than the sum of its proper divisors (25232712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16821768 is a wasteful number, since it uses less digits than its factorization.

16821768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700916 (or 700912 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 16821768 is about 4101.4348708714. The cubic root of 16821768 is about 256.2264029034.

The spelling of 16821768 in words is "sixteen million, eight hundred twenty-one thousand, seven hundred sixty-eight".