16421344 has 12 divisors (see below), whose sum is σ = 32329584. Its totient is φ = 8210656.

The previous prime is 16421341. The next prime is 16421347. The reversal of 16421344 is 44312461.

16421344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16421341) and next prime (16421347).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256552 + ... + 256615.

It is an arithmetic number, because the mean of its divisors is an integer number (2694132).

Almost surely, 2^16421344 is an apocalyptic number.

It is an amenable number.

16421344 is a deficient number, since it is larger than the sum of its proper divisors (15908240).

16421344 is an equidigital number, since it uses as much as digits as its factorization.

16421344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513177 (or 513169 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 16421344 is about 4052.3257519602. The cubic root of 16421344 is about 254.1769903299.

The spelling of 16421344 in words is "sixteen million, four hundred twenty-one thousand, three hundred forty-four".