21044143224 has 128 divisors (see below), whose sum is σ = 63002419200. Its totient is φ = 6469994880.

The previous prime is 21044143213. The next prime is 21044143247. The reversal of 21044143224 is 42234144012.

21044143224 is a `hidden beast` number, since 21 + 0 + 4 + 414 + 3 + 224 = 666.

It is a super-2 number, since 2×21044143224² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5116929 + ... + 5121039.

It is an arithmetic number, because the mean of its divisors is an integer number (492206400).

Almost surely, 2^21044143224 is an apocalyptic number.

21044143224 is a gapful number since it is divisible by the number (24) 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 21044143224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31501209600).

21044143224 is an abundant number, since it is smaller than the sum of its proper divisors (41958275976).

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

21044143224 is a wasteful number, since it uses less digits than its factorization.

21044143224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5962 (or 5952 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21044143224 its reverse (42234144012), we get a palindrome (63278287236).

The spelling of 21044143224 in words is "twenty-one billion, forty-four million, one hundred forty-three thousand, two hundred twenty-four".