21266324 has 12 divisors (see below), whose sum is σ = 37285248. Its totient is φ = 10613400.

The previous prime is 21266321. The next prime is 21266327. The reversal of 21266324 is 42366212.

It is an interprime number because it is at equal distance from previous prime (21266321) and next prime (21266327).

It is a junction number, because it is equal to n+sod(n) for n = 21266293 and 21266302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21266321) 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 3 ways as a sum of consecutive naturals, for example, 2372 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (3107104).

Almost surely, 2^21266324 is an apocalyptic number.

It is an amenable number.

21266324 is a deficient number, since it is larger than the sum of its proper divisors (16018924).

21266324 is a wasteful number, since it uses less digits than its factorization.

21266324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9886 (or 9884 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 21266324 is about 4611.5424751378. The cubic root of 21266324 is about 277.0538196892.

The spelling of 21266324 in words is "twenty-one million, two hundred sixty-six thousand, three hundred twenty-four".