21442241320 has 16 divisors (see below), whose sum is σ = 48245043060. Its totient is φ = 8576896512.

The previous prime is 21442241311. The next prime is 21442241413. The reversal of 21442241320 is 2314224412.

It can be written as a sum of positive squares in 2 ways, for example, as 20843851876 + 598389444 = 144374^2 + 24462^2 .

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 3 ways as a sum of consecutive naturals, for example, 268027977 + ... + 268028056.

Almost surely, 2^21442241320 is an apocalyptic number.

21442241320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21442241320 is an abundant number, since it is smaller than the sum of its proper divisors (26802801740).

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

21442241320 is a wasteful number, since it uses less digits than its factorization.

21442241320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536056044 (or 536056040 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21442241320 its reverse (2314224412), we get a palindrome (23756465732).

The spelling of 21442241320 in words is "twenty-one billion, four hundred forty-two million, two hundred forty-one thousand, three hundred twenty".