21443433113 has 16 divisors (see below), whose sum is σ = 22175936640. Its totient is φ = 20721947904.

The previous prime is 21443433073. The next prime is 21443433133. The reversal of 21443433113 is 31133434412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21443433113 - 2¹⁰ = 21443432089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443433133) 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 15 ways as a sum of consecutive naturals, for example, 7567745 + ... + 7570577.

It is an arithmetic number, because the mean of its divisors is an integer number (1385996040).

Almost surely, 2^21443433113 is an apocalyptic number.

It is an amenable number.

21443433113 is a deficient number, since it is larger than the sum of its proper divisors (732503527).

21443433113 is a wasteful number, since it uses less digits than its factorization.

21443433113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688.

The product of its digits is 10368, while the sum is 29.

Adding to 21443433113 its reverse (31133434412), we get a palindrome (52576867525).

The spelling of 21443433113 in words is "twenty-one billion, four hundred forty-three million, four hundred thirty-three thousand, one hundred thirteen".