21043541135 has 8 divisors (see below), whose sum is σ = 25934742816. Its totient is φ = 16379837280.

The previous prime is 21043541119. The next prime is 21043541159. The reversal of 21043541135 is 53114534012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21043541135 - 2⁴ = 21043541119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21043541098 and 21043541107.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56874251 + ... + 56874620.

It is an arithmetic number, because the mean of its divisors is an integer number (3241842852).

Almost surely, 2^21043541135 is an apocalyptic number.

21043541135 is a deficient number, since it is larger than the sum of its proper divisors (4891201681).

21043541135 is a wasteful number, since it uses less digits than its factorization.

21043541135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113748913.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 21043541135 in words is "twenty-one billion, forty-three million, five hundred forty-one thousand, one hundred thirty-five".