21543341344 has 24 divisors (see below), whose sum is σ = 48472518528. Its totient is φ = 9232860480.

The previous prime is 21543341263. The next prime is 21543341357. The reversal of 21543341344 is 44314334512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48087592 + ... + 48088039.

It is an arithmetic number, because the mean of its divisors is an integer number (2019688272).

Almost surely, 2^21543341344 is an apocalyptic number.

It is an amenable number.

21543341344 is an abundant number, since it is smaller than the sum of its proper divisors (26929177184).

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

21543341344 is an equidigital number, since it uses as much as digits as its factorization.

21543341344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96175648 (or 96175640 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

Adding to 21543341344 its reverse (44314334512), we get a palindrome (65857675856).

The spelling of 21543341344 in words is "twenty-one billion, five hundred forty-three million, three hundred forty-one thousand, three hundred forty-four".