21235332 has 24 divisors (see below), whose sum is σ = 49655872. Its totient is φ = 7063200.

The previous prime is 21235297. The next prime is 21235343. The reversal of 21235332 is 23353212.

It is a junction number, because it is equal to n+sod(n) for n = 21235299 and 21235308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4857 + ... + 8127.

Almost surely, 2^21235332 is an apocalyptic number.

It is an amenable number.

21235332 is an abundant number, since it is smaller than the sum of its proper divisors (28420540).

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

21235332 is a wasteful number, since it uses less digits than its factorization.

21235332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819 (or 3817 counting only the distinct ones).

The product of its digits is 1080, while the sum is 21.

The square root of 21235332 is about 4608.1809860291. The cubic root of 21235332 is about 276.9191682022.

Adding to 21235332 its reverse (23353212), we get a palindrome (44588544).

The spelling of 21235332 in words is "twenty-one million, two hundred thirty-five thousand, three hundred thirty-two".