21443010433 has 8 divisors (see below), whose sum is σ = 23212125608. Its totient is φ = 19690988544.

The previous prime is 21443010431. The next prime is 21443010439. The reversal of 21443010433 is 33401034412.

It can be written as a sum of positive squares in 4 ways, for example, as 131974144 + 21311036289 = 11488^2 + 145983^2 .

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 21443010433 - 2¹ = 21443010431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21443010398 and 21443010407.

It is not an unprimeable number, because it can be changed into a prime (21443010431) 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 7 ways as a sum of consecutive naturals, for example, 4270710 + ... + 4275727.

It is an arithmetic number, because the mean of its divisors is an integer number (2901515701).

Almost surely, 2^21443010433 is an apocalyptic number.

It is an amenable number.

21443010433 is a deficient number, since it is larger than the sum of its proper divisors (1769115175).

21443010433 is a wasteful number, since it uses less digits than its factorization.

21443010433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8546643.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21443010433 its reverse (33401034412), we get a palindrome (54844044845).

The spelling of 21443010433 in words is "twenty-one billion, four hundred forty-three million, ten thousand, four hundred thirty-three".