21326996443 has 8 divisors (see below), whose sum is σ = 22452321600. Its totient is φ = 20201956488.

The previous prime is 21326996413. The next prime is 21326996521. The reversal of 21326996443 is 34469962312.

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 21326996443 - 2⁹ = 21326995931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21326996413) 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, 91788 + ... + 226006.

It is an arithmetic number, because the mean of its divisors is an integer number (2806540200).

Almost surely, 2^21326996443 is an apocalyptic number.

21326996443 is a deficient number, since it is larger than the sum of its proper divisors (1125325157).

21326996443 is a wasteful number, since it uses less digits than its factorization.

21326996443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142601.

The product of its digits is 1679616, while the sum is 49.

The spelling of 21326996443 in words is "twenty-one billion, three hundred twenty-six million, nine hundred ninety-six thousand, four hundred forty-three".