16941821 has 16 divisors (see below), whose sum is σ = 18918144. Its totient is φ = 15073344.

The previous prime is 16941811. The next prime is 16941833. The reversal of 16941821 is 12814961.

It is not a de Polignac number, because 16941821 - 2¹⁴ = 16925437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16941811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45980 + ... + 46346.

It is an arithmetic number, because the mean of its divisors is an integer number (1182384).

Almost surely, 2^16941821 is an apocalyptic number.

It is an amenable number.

16941821 is a deficient number, since it is larger than the sum of its proper divisors (1976323).

16941821 is a wasteful number, since it uses less digits than its factorization.

16941821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its digits is 3456, while the sum is 32.

The square root of 16941821 is about 4116.0443389254. The cubic root of 16941821 is about 256.8345010872.

It can be divided in two parts, 169418 and 21, that multiplied together give a triangular number (3557778 = T₂₆₆₇).

The spelling of 16941821 in words is "sixteen million, nine hundred forty-one thousand, eight hundred twenty-one".