21826328 has 16 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 10536736.

The previous prime is 21826267. The next prime is 21826361. The reversal of 21826328 is 82362812.

It is a junction number, because it is equal to n+sod(n) for n = 21826294 and 21826303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46808 + ... + 47271.

It is an arithmetic number, because the mean of its divisors is an integer number (2646000).

Almost surely, 2^21826328 is an apocalyptic number.

It is an amenable number.

21826328 is a deficient number, since it is larger than the sum of its proper divisors (20509672).

21826328 is a wasteful number, since it uses less digits than its factorization.

21826328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94114 (or 94110 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 21826328 is about 4671.8655802581. The cubic root of 21826328 is about 279.4646573826.

The spelling of 21826328 in words is "twenty-one million, eight hundred twenty-six thousand, three hundred twenty-eight".