21443532334009 has 4 divisors (see below), whose sum is σ = 22375859826816. Its totient is φ = 20511204841204.

The previous prime is 21443532333967. The next prime is 21443532334019. The reversal of 21443532334009 is 90043323534412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21443532334009 - 2⁹ = 21443532333497 is a prime.

It is a super-2 number, since 2×21443532334009² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443532334019) 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 3 ways as a sum of consecutive naturals, for example, 466163746369 + ... + 466163746414.

It is an arithmetic number, because the mean of its divisors is an integer number (5593964956704).

Almost surely, 2^{21443532334009} is an apocalyptic number.

It is an amenable number.

21443532334009 is a deficient number, since it is larger than the sum of its proper divisors (932327492807).

21443532334009 is an equidigital number, since it uses as much as digits as its factorization.

21443532334009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932327492806.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 21443532334009 in words is "twenty-one trillion, four hundred forty-three billion, five hundred thirty-two million, three hundred thirty-four thousand, nine".