21331443132 has 36 divisors (see below), whose sum is σ = 53950137696. Its totient is φ = 7106658240.

The previous prime is 21331443121. The next prime is 21331443143. The reversal of 21331443132 is 23134413312.

It is a happy number.

21331443132 is a `hidden beast` number, since 213 + 3 + 1 + 443 + 1 + 3 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21331443121) and next prime (21331443143).

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21331443096 and 21331443105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90993 + ... + 225704.

It is an arithmetic number, because the mean of its divisors is an integer number (1498614936).

Almost surely, 2^21331443132 is an apocalyptic number.

It is an amenable number.

21331443132 is an abundant number, since it is smaller than the sum of its proper divisors (32618694564).

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

21331443132 is a wasteful number, since it uses less digits than its factorization.

21331443132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318578 (or 318573 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 21331443132 its reverse (23134413312), we get a palindrome (44465856444).

The spelling of 21331443132 in words is "twenty-one billion, three hundred thirty-one million, four hundred forty-three thousand, one hundred thirty-two".