21030132 has 24 divisors (see below), whose sum is σ = 49744576. Its totient is φ = 6913728.

The previous prime is 21030127. The next prime is 21030181. The reversal of 21030132 is 23103012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 11128 + ... + 12879.

Almost surely, 2^21030132 is an apocalyptic number.

It is an amenable number.

21030132 is an abundant number, since it is smaller than the sum of its proper divisors (28714444).

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

21030132 is a wasteful number, since it uses less digits than its factorization.

21030132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24087 (or 24085 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 21030132 is about 4585.8621872010. The cubic root of 21030132 is about 276.0243099780.

Adding to 21030132 its reverse (23103012), we get a palindrome (44133144).

The spelling of 21030132 in words is "twenty-one million, thirty thousand, one hundred thirty-two".