21343267 has 8 divisors (see below), whose sum is σ = 23373360. Its totient is φ = 19328160.

The previous prime is 21343261. The next prime is 21343307. The reversal of 21343267 is 76234312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21343267 - 2⁷ = 21343139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343261) 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 7 ways as a sum of consecutive naturals, for example, 648 + ... + 6565.

It is an arithmetic number, because the mean of its divisors is an integer number (2921670).

Almost surely, 2^21343267 is an apocalyptic number.

21343267 is a deficient number, since it is larger than the sum of its proper divisors (2030093).

21343267 is a wasteful number, since it uses less digits than its factorization.

21343267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7493.

The product of its digits is 6048, while the sum is 28.

The square root of 21343267 is about 4619.8773793251. The cubic root of 21343267 is about 277.3875506840.

Adding to 21343267 its reverse (76234312), we get a palindrome (97577579).

The spelling of 21343267 in words is "twenty-one million, three hundred forty-three thousand, two hundred sixty-seven".