21314132 has 24 divisors (see below), whose sum is σ = 43330560. Its totient is φ = 8984160.

The previous prime is 21314087. The next prime is 21314149. The reversal of 21314132 is 23141312.

It is a self number, because there is not a number n which added to its sum of digits gives 21314132.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 4532 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (1805440).

Almost surely, 2^21314132 is an apocalyptic number.

It is an amenable number.

21314132 is an abundant number, since it is smaller than the sum of its proper divisors (22016428).

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

21314132 is a wasteful number, since it uses less digits than its factorization.

21314132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12551 (or 12549 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 21314132 is about 4616.7230802811. The cubic root of 21314132 is about 277.2612756324.

Adding to 21314132 its reverse (23141312), we get a palindrome (44455444).

The spelling of 21314132 in words is "twenty-one million, three hundred fourteen thousand, one hundred thirty-two".