21233132 has 12 divisors (see below), whose sum is σ = 37215360. Its totient is φ = 10600176.

The previous prime is 21233131. The next prime is 21233161. The reversal of 21233132 is 23133212.

It is a self number, because there is not a number n which added to its sum of digits gives 21233132.

It is not an unprimeable number, because it can be changed into a prime (21233131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (3101280).

Almost surely, 2^21233132 is an apocalyptic number.

It is an amenable number.

21233132 is a deficient number, since it is larger than the sum of its proper divisors (15982228).

21233132 is a wasteful number, since it uses less digits than its factorization.

21233132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200 (or 8198 counting only the distinct ones).

The product of its digits is 216, while the sum is 17.

The square root of 21233132 is about 4607.9422739440. The cubic root of 21233132 is about 276.9096048448.

Adding to 21233132 its reverse (23133212), we get a palindrome (44366344).

The spelling of 21233132 in words is "twenty-one million, two hundred thirty-three thousand, one hundred thirty-two".