21302328 has 32 divisors (see below), whose sum is σ = 53859600. Its totient is φ = 7020288.

The previous prime is 21302321. The next prime is 21302371. The reversal of 21302328 is 82320312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2851 + ... + 7122.

Almost surely, 2^21302328 is an apocalyptic number.

It is an amenable number.

21302328 is an abundant number, since it is smaller than the sum of its proper divisors (32557272).

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

21302328 is a wasteful number, since it uses less digits than its factorization.

21302328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10071 (or 10067 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21302328 is about 4615.4445073037. Note that the first 3 decimals coincide. The cubic root of 21302328 is about 277.2100827360.

The spelling of 21302328 in words is "twenty-one million, three hundred two thousand, three hundred twenty-eight".