16421324 has 12 divisors (see below), whose sum is σ = 29034264. Its totient is φ = 8125824.

The previous prime is 16421323. The next prime is 16421341. The reversal of 16421324 is 42312461.

It is a self number, because there is not a number n which added to its sum of digits gives 16421324.

It is not an unprimeable number, because it can be changed into a prime (16421323) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 20774 + ... + 21549.

It is an arithmetic number, because the mean of its divisors is an integer number (2419522).

Almost surely, 2^16421324 is an apocalyptic number.

It is an amenable number.

16421324 is a deficient number, since it is larger than the sum of its proper divisors (12612940).

16421324 is a wasteful number, since it uses less digits than its factorization.

16421324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42424 (or 42422 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 16421324 is about 4052.3232842408. The cubic root of 16421324 is about 254.1768871401.

Adding to 16421324 its reverse (42312461), we get a palindrome (58733785).

The spelling of 16421324 in words is "sixteen million, four hundred twenty-one thousand, three hundred twenty-four".