21126327 has 8 divisors (see below), whose sum is σ = 28235520. Its totient is φ = 14050680.

The previous prime is 21126317. The next prime is 21126337. The reversal of 21126327 is 72362112.

It is an interprime number because it is at equal distance from previous prime (21126317) and next prime (21126337).

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

It is not a de Polignac number, because 21126327 - 2¹⁰ = 21125303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21126297 and 21126306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21126317) 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 in 7 ways as a sum of consecutive naturals, for example, 6877 + ... + 9462.

It is an arithmetic number, because the mean of its divisors is an integer number (3529440).

Almost surely, 2^21126327 is an apocalyptic number.

21126327 is a deficient number, since it is larger than the sum of its proper divisors (7109193).

21126327 is a wasteful number, since it uses less digits than its factorization.

21126327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16773.

The product of its digits is 1008, while the sum is 24.

The square root of 21126327 is about 4596.3384340146. The cubic root of 21126327 is about 276.4445288737. Note that the first 3 decimals are identical.

Adding to 21126327 its reverse (72362112), we get a palindrome (93488439).

The spelling of 21126327 in words is "twenty-one million, one hundred twenty-six thousand, three hundred twenty-seven".