21143303433 has 48 divisors (see below), whose sum is σ = 35759426560. Its totient is φ = 11786215392.

The previous prime is 21143303413. The next prime is 21143303477. The reversal of 21143303433 is 33430334112.

It is not a de Polignac number, because 21143303433 - 2¹⁴ = 21143287049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21143303397 and 21143303406.

It is not an unprimeable number, because it can be changed into a prime (21143303413) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 2387628 + ... + 2396466.

Almost surely, 2^21143303433 is an apocalyptic number.

It is an amenable number.

21143303433 is a deficient number, since it is larger than the sum of its proper divisors (14616123127).

21143303433 is a wasteful number, since it uses less digits than its factorization.

21143303433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9778 (or 9775 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21143303433 its reverse (33430334112), we get a palindrome (54573637545).

The spelling of 21143303433 in words is "twenty-one billion, one hundred forty-three million, three hundred three thousand, four hundred thirty-three".