21544344344512 has 112 divisors (see below), whose sum is σ = 47590526229984. Its totient is φ = 9593565696000.

The previous prime is 21544344344473. The next prime is 21544344344557.

21544344344512 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24226462 + ... + 25100002.

Almost surely, 2^{21544344344512} is an apocalyptic number.

21544344344512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21544344344512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23795263114992).

21544344344512 is an abundant number, since it is smaller than the sum of its proper divisors (26046181885472).

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

21544344344512 is a wasteful number, since it uses less digits than its factorization.

21544344344512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874278 (or 874268 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 46.

It can be divided in two parts, 2154434 and 4344512, that added together give a palindrome (6498946).

The spelling of 21544344344512 in words is "twenty-one trillion, five hundred forty-four billion, three hundred forty-four million, three hundred forty-four thousand, five hundred twelve".