21332367 has 12 divisors (see below), whose sum is σ = 35215440. Its totient is φ = 12189888.

The previous prime is 21332359. The next prime is 21332369. The reversal of 21332367 is 76323312.

It is not a de Polignac number, because 21332367 - 2³ = 21332359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21332367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332369) 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 11 ways as a sum of consecutive naturals, for example, 169242 + ... + 169367.

It is an arithmetic number, because the mean of its divisors is an integer number (2934620).

Almost surely, 2^21332367 is an apocalyptic number.

21332367 is a deficient number, since it is larger than the sum of its proper divisors (13883073).

21332367 is a wasteful number, since it uses less digits than its factorization.

21332367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338622 (or 338619 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 21332367 is about 4618.6975436805. The cubic root of 21332367 is about 277.3403220638.

Adding to 21332367 its reverse (76323312), we get a palindrome (97655679).

The spelling of 21332367 in words is "twenty-one million, three hundred thirty-two thousand, three hundred sixty-seven".