16421924 has 24 divisors (see below), whose sum is σ = 29342880. Its totient is φ = 8040384.

The previous prime is 16421897. The next prime is 16421963. The reversal of 16421924 is 42912461.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 57887 + ... + 58169.

It is an arithmetic number, because the mean of its divisors is an integer number (1222620).

Almost surely, 2^16421924 is an apocalyptic number.

It is an amenable number.

16421924 is a deficient number, since it is larger than the sum of its proper divisors (12920956).

16421924 is a wasteful number, since it uses less digits than its factorization.

16421924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 537 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 16421924 is about 4052.3973151704. The cubic root of 16421924 is about 254.1799827954.

The spelling of 16421924 in words is "sixteen million, four hundred twenty-one thousand, nine hundred twenty-four".