21310132 has 12 divisors (see below), whose sum is σ = 37356256. Its totient is φ = 10636920.

The previous prime is 21310117. The next prime is 21310139. The reversal of 21310132 is 23101312.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310139) 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, 1698 + ... + 6745.

Almost surely, 2^21310132 is an apocalyptic number.

It is an amenable number.

21310132 is a deficient number, since it is larger than the sum of its proper divisors (16046124).

21310132 is a wasteful number, since it uses less digits than its factorization.

21310132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9078 (or 9076 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21310132 is about 4616.2898522515. The cubic root of 21310132 is about 277.2439301064.

Adding to 21310132 its reverse (23101312), we get a palindrome (44411444).

The spelling of 21310132 in words is "twenty-one million, three hundred ten thousand, one hundred thirty-two".