21852132 has 24 divisors (see below), whose sum is σ = 51070656. Its totient is φ = 7272288.

The previous prime is 21852121. The next prime is 21852137. The reversal of 21852132 is 23125812.

It is not an unprimeable number, because it can be changed into a prime (21852137) 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, 9618 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (2127944).

Almost surely, 2^21852132 is an apocalyptic number.

It is an amenable number.

21852132 is an abundant number, since it is smaller than the sum of its proper divisors (29218524).

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

21852132 is a wasteful number, since it uses less digits than its factorization.

21852132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947 (or 2945 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 21852132 is about 4674.6264021845. The cubic root of 21852132 is about 279.5747456217.

Adding to 21852132 its reverse (23125812), we get a palindrome (44977944).

The spelling of 21852132 in words is "twenty-one million, eight hundred fifty-two thousand, one hundred thirty-two".