21232132 has 6 divisors (see below), whose sum is σ = 37156238. Its totient is φ = 10616064.

The previous prime is 21232121. The next prime is 21232157. The reversal of 21232132 is 23123212.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 7214596 = 3744^2 + 2686^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2654013 + ... + 2654020.

Almost surely, 2^21232132 is an apocalyptic number.

It is an amenable number.

21232132 is a deficient number, since it is larger than the sum of its proper divisors (15924106).

21232132 is a wasteful number, since it uses less digits than its factorization.

21232132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308037 (or 5308035 counting only the distinct ones).

The product of its digits is 144, while the sum is 16.

The square root of 21232132 is about 4607.8337643626. The cubic root of 21232132 is about 276.9052576457.

Adding to 21232132 its reverse (23123212), we get a palindrome (44355344).

The spelling of 21232132 in words is "twenty-one million, two hundred thirty-two thousand, one hundred thirty-two".