21300132 has 24 divisors (see below), whose sum is σ = 56800576. Its totient is φ = 6085728.

The previous prime is 21300127. The next prime is 21300137. The reversal of 21300132 is 23100312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21300127) and next prime (21300137).

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

It is not an unprimeable number, because it can be changed into a prime (21300137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126703 + ... + 126870.

Almost surely, 2^21300132 is an apocalyptic number.

It is an amenable number.

21300132 is an abundant number, since it is smaller than the sum of its proper divisors (35500444).

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

21300132 is a wasteful number, since it uses less digits than its factorization.

21300132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253587 (or 253585 counting only the distinct ones).

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

The square root of 21300132 is about 4615.2066042594. The cubic root of 21300132 is about 277.2005567934.

Adding to 21300132 its reverse (23100312), we get a palindrome (44400444).

The spelling of 21300132 in words is "twenty-one million, three hundred thousand, one hundred thirty-two".