21184022144 has 64 divisors (see below), whose sum is σ = 42550401600. Its totient is φ = 10505011200.

The previous prime is 21184022137. The next prime is 21184022149. The reversal of 21184022144 is 44122048112.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (21184022149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13230944 + ... + 13232544.

It is an arithmetic number, because the mean of its divisors is an integer number (664850025).

Almost surely, 2^21184022144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21184022144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21275200800).

21184022144 is an abundant number, since it is smaller than the sum of its proper divisors (21366379456).

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

21184022144 is a wasteful number, since it uses less digits than its factorization.

21184022144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The spelling of 21184022144 in words is "twenty-one billion, one hundred eighty-four million, twenty-two thousand, one hundred forty-four".