21443204040342 has 16 divisors (see below), whose sum is σ = 49013037806592. Its totient is φ = 6126629725800.

The previous prime is 21443204040331. The next prime is 21443204040361. The reversal of 21443204040342 is 24304040234412.

It is a congruent number.

It is an unprimeable number.

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, 255276238534 + ... + 255276238617.

It is an arithmetic number, because the mean of its divisors is an integer number (3063314862912).

Almost surely, 2^{21443204040342} is an apocalyptic number.

21443204040342 is an abundant number, since it is smaller than the sum of its proper divisors (27569833766250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21443204040342 is a wasteful number, since it uses less digits than its factorization.

21443204040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510552477163.

The product of its (nonzero) digits is 73728, while the sum is 33.

Adding to 21443204040342 its reverse (24304040234412), we get a palindrome (45747244274754).

The spelling of 21443204040342 in words is "twenty-one trillion, four hundred forty-three billion, two hundred four million, forty thousand, three hundred forty-two".