21232432 has 20 divisors (see below), whose sum is σ = 44302720. Its totient is φ = 9799488.

The previous prime is 21232429. The next prime is 21232441. The reversal of 21232432 is 23423212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50832 + ... + 51247.

It is an arithmetic number, because the mean of its divisors is an integer number (2215136).

Almost surely, 2^21232432 is an apocalyptic number.

It is an amenable number.

21232432 is an abundant number, since it is smaller than the sum of its proper divisors (23070288).

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

21232432 is a wasteful number, since it uses less digits than its factorization.

21232432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102100 (or 102094 counting only the distinct ones).

The product of its digits is 576, while the sum is 19.

The square root of 21232432 is about 4607.8663175053. The cubic root of 21232432 is about 276.9065618198.

Adding to 21232432 its reverse (23423212), we get a palindrome (44655644).

The spelling of 21232432 in words is "twenty-one million, two hundred thirty-two thousand, four hundred thirty-two".