21412132 has 12 divisors (see below), whose sum is σ = 42824320. Its totient is φ = 9176616.

The previous prime is 21412123. The next prime is 21412133. The reversal of 21412132 is 23121412.

21412132 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21412133) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 382332 + ... + 382387.

Almost surely, 2^21412132 is an apocalyptic number.

It is an amenable number.

21412132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21412132 is a wasteful number, since it uses less digits than its factorization.

21412132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764730 (or 764728 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 21412132 is about 4627.3244969421. The cubic root of 21412132 is about 277.6855648169.

Adding to 21412132 its reverse (23121412), we get a palindrome (44533544).

The spelling of 21412132 in words is "twenty-one million, four hundred twelve thousand, one hundred thirty-two".