21043541143 has 16 divisors (see below), whose sum is σ = 22283308800. Its totient is φ = 19817360640.

The previous prime is 21043541119. The next prime is 21043541159. The reversal of 21043541143 is 34114534012.

It is a cyclic number.

It is not a de Polignac number, because 21043541143 - 2⁹ = 21043540631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043541173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2215278 + ... + 2224756.

It is an arithmetic number, because the mean of its divisors is an integer number (1392706800).

Almost surely, 2^21043541143 is an apocalyptic number.

21043541143 is a deficient number, since it is larger than the sum of its proper divisors (1239767657).

21043541143 is a wasteful number, since it uses less digits than its factorization.

21043541143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10182.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 21043541143 in words is "twenty-one billion, forty-three million, five hundred forty-one thousand, one hundred forty-three".