21330352 has 40 divisors (see below), whose sum is σ = 42916896. Its totient is φ = 10262016.

The previous prime is 21330347. The next prime is 21330367. The reversal of 21330352 is 25303312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80973 + ... + 81235.

Almost surely, 2^21330352 is an apocalyptic number.

It is an amenable number.

21330352 is an abundant number, since it is smaller than the sum of its proper divisors (21586544).

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

21330352 is a wasteful number, since it uses less digits than its factorization.

21330352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 21330352 is about 4618.4794034401. The cubic root of 21330352 is about 277.3315895066.

Adding to 21330352 its reverse (25303312), we get a palindrome (46633664).

The spelling of 21330352 in words is "twenty-one million, three hundred thirty thousand, three hundred fifty-two".