21444321140343 has 64 divisors (see below), whose sum is σ = 32957350272000. Its totient is φ = 13764429366912.

The previous prime is 21444321140317. The next prime is 21444321140453. The reversal of 21444321140343 is 34304112344412.

21444321140343 is a `hidden beast` number, since 2 + 1 + 44 + 432 + 1 + 140 + 3 + 43 = 666.

It is not a de Polignac number, because 21444321140343 - 2⁶ = 21444321140279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21444321140298 and 21444321140307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444321148343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 682989721 + ... + 683021117.

It is an arithmetic number, because the mean of its divisors is an integer number (514958598000).

Almost surely, 2^{21444321140343} is an apocalyptic number.

21444321140343 is a deficient number, since it is larger than the sum of its proper divisors (11513029131657).

21444321140343 is a wasteful number, since it uses less digits than its factorization.

21444321140343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33861 (or 33855 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 21444321140343 its reverse (34304112344412), we get a palindrome (55748433484755).

The spelling of 21444321140343 in words is "twenty-one trillion, four hundred forty-four billion, three hundred twenty-one million, one hundred forty thousand, three hundred forty-three".