21443232352 has 24 divisors (see below), whose sum is σ = 42219633456. Its totient is φ = 10720785792.

The previous prime is 21443232341. The next prime is 21443232367. The reversal of 21443232352 is 25323234412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758373 + ... + 786139.

It is an arithmetic number, because the mean of its divisors is an integer number (1759151394).

Almost surely, 2^21443232352 is an apocalyptic number.

It is an amenable number.

21443232352 is a deficient number, since it is larger than the sum of its proper divisors (20776401104).

21443232352 is a wasteful number, since it uses less digits than its factorization.

21443232352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51910 (or 51902 counting only the distinct ones).

The product of its digits is 34560, while the sum is 31.

Adding to 21443232352 its reverse (25323234412), we get a palindrome (46766466764).

The spelling of 21443232352 in words is "twenty-one billion, four hundred forty-three million, two hundred thirty-two thousand, three hundred fifty-two".