21444552232512 has 56 divisors (see below), whose sum is σ = 56763586764192. Its totient is φ = 7145050137600.

The previous prime is 21444552232451. The next prime is 21444552232513. The reversal of 21444552232512 is 21523225544412.

It is not an unprimeable number, because it can be changed into a prime (21444552232513) by changing a digit.

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, 24044814 + ... + 24920717.

It is an arithmetic number, because the mean of its divisors is an integer number (1013635477932).

Almost surely, 2^{21444552232512} is an apocalyptic number.

It is an amenable number.

21444552232512 is an abundant number, since it is smaller than the sum of its proper divisors (35319034531680).

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

21444552232512 is a wasteful number, since it uses less digits than its factorization.

21444552232512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48967827 (or 48967817 counting only the distinct ones).

The product of its digits is 768000, while the sum is 42.

Adding to 21444552232512 its reverse (21523225544412), we get a palindrome (42967777776924).

The spelling of 21444552232512 in words is "twenty-one trillion, four hundred forty-four billion, five hundred fifty-two million, two hundred thirty-two thousand, five hundred twelve".