21332132 has 12 divisors (see below), whose sum is σ = 38954496. Its totient is φ = 10202280.

The previous prime is 21332119. The next prime is 21332141. The reversal of 21332132 is 23123312.

It is a self number, because there is not a number n which added to its sum of digits gives 21332132.

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, 115844 + ... + 116027.

It is an arithmetic number, because the mean of its divisors is an integer number (3246208).

It is a self-describing number.

Almost surely, 2^21332132 is an apocalyptic number.

It is an amenable number.

21332132 is a deficient number, since it is larger than the sum of its proper divisors (17622364).

21332132 is a wasteful number, since it uses less digits than its factorization.

21332132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231898 (or 231896 counting only the distinct ones).

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

The square root of 21332132 is about 4618.6721035380. The cubic root of 21332132 is about 277.3393036550.

Adding to 21332132 its reverse (23123312), we get a palindrome (44455444).

The spelling of 21332132 in words is "twenty-one million, three hundred thirty-two thousand, one hundred thirty-two".