21144844112 has 40 divisors (see below), whose sum is σ = 46839240192. Its totient is φ = 9058492800.

The previous prime is 21144844099. The next prime is 21144844117.

21144844112 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144844117) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 257537 + ... + 329567.

Almost surely, 2^21144844112 is an apocalyptic number.

It is an amenable number.

21144844112 is an abundant number, since it is smaller than the sum of its proper divisors (25694396080).

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

21144844112 is a wasteful number, since it uses less digits than its factorization.

21144844112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74667 (or 74661 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The spelling of 21144844112 in words is "twenty-one billion, one hundred forty-four million, eight hundred forty-four thousand, one hundred twelve".