21444313242 has 64 divisors (see below), whose sum is σ = 47092285440. Its totient is φ = 6456105600.

The previous prime is 21444313193. The next prime is 21444313337. The reversal of 21444313242 is 24231344412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7101609 + ... + 7104627.

It is an arithmetic number, because the mean of its divisors is an integer number (735816960).

Almost surely, 2^21444313242 is an apocalyptic number.

21444313242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21444313242 is an abundant number, since it is smaller than the sum of its proper divisors (25647972198).

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

21444313242 is a wasteful number, since it uses less digits than its factorization.

21444313242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699.

The product of its digits is 18432, while the sum is 30.

Adding to 21444313242 its reverse (24231344412), we get a palindrome (45675657654).

The spelling of 21444313242 in words is "twenty-one billion, four hundred forty-four million, three hundred thirteen thousand, two hundred forty-two".