21347296 has 12 divisors (see below), whose sum is σ = 42027552. Its totient is φ = 10673632.

The previous prime is 21347267. The next prime is 21347297. The reversal of 21347296 is 69274312.

21347296 is nontrivially palindromic in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21347297) 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 as a sum of consecutive naturals, namely, 333520 + ... + 333583.

It is an arithmetic number, because the mean of its divisors is an integer number (3502296).

Almost surely, 2^21347296 is an apocalyptic number.

It is an amenable number.

21347296 is a deficient number, since it is larger than the sum of its proper divisors (20680256).

21347296 is an equidigital number, since it uses as much as digits as its factorization.

21347296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667113 (or 667105 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 21347296 is about 4620.3134092830. The cubic root of 21347296 is about 277.4050038716.

The spelling of 21347296 in words is "twenty-one million, three hundred forty-seven thousand, two hundred ninety-six".