21043143332 has 6 divisors (see below), whose sum is σ = 36825500838. Its totient is φ = 10521571664.

The previous prime is 21043143323. The next prime is 21043143347. The reversal of 21043143332 is 23334134012.

It can be written as a sum of positive squares in only one way, i.e., 19506032896 + 1537110436 = 139664^2 + 39206^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630392913 + ... + 2630392920.

It is an arithmetic number, because the mean of its divisors is an integer number (6137583473).

Almost surely, 2^21043143332 is an apocalyptic number.

It is an amenable number.

21043143332 is a deficient number, since it is larger than the sum of its proper divisors (15782357506).

21043143332 is a wasteful number, since it uses less digits than its factorization.

21043143332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260785837 (or 5260785835 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21043143332 its reverse (23334134012), we get a palindrome (44377277344).

The spelling of 21043143332 in words is "twenty-one billion, forty-three million, one hundred forty-three thousand, three hundred thirty-two".