21088326 has 32 divisors (see below), whose sum is σ = 49190400. Its totient is φ = 6024648.

The previous prime is 21088321. The next prime is 21088337. The reversal of 21088326 is 62388012.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21088293 and 21088302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21088321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3066 + ... + 7181.

It is an arithmetic number, because the mean of its divisors is an integer number (1537200).

Almost surely, 2^21088326 is an apocalyptic number.

21088326 is an abundant number, since it is smaller than the sum of its proper divisors (28102074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21088326 is a wasteful number, since it uses less digits than its factorization.

21088326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10273 (or 10259 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 21088326 is about 4592.2027394269. The cubic root of 21088326 is about 276.2786777760.

The spelling of 21088326 in words is "twenty-one million, eighty-eight thousand, three hundred twenty-six".