21043750229 has 8 divisors (see below), whose sum is σ = 21089679168. Its totient is φ = 20997849600.

The previous prime is 21043750201. The next prime is 21043750289. The reversal of 21043750229 is 92205734012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21043750229 - 2²⁰ = 21042701653 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 (21043750289) 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 7 ways as a sum of consecutive naturals, for example, 2187029 + ... + 2196629.

It is an arithmetic number, because the mean of its divisors is an integer number (2636209896).

Almost surely, 2^21043750229 is an apocalyptic number.

It is an amenable number.

21043750229 is a deficient number, since it is larger than the sum of its proper divisors (45928939).

21043750229 is an equidigital number, since it uses as much as digits as its factorization.

21043750229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 21043750229 in words is "twenty-one billion, forty-three million, seven hundred fifty thousand, two hundred twenty-nine".