21344444032 has 64 divisors (see below), whose sum is σ = 42768518400. Its totient is φ = 10610611200.

The previous prime is 21344444003. The next prime is 21344444047. The reversal of 21344444032 is 23044444312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21344443985 and 21344444003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23225269 + ... + 23226187.

It is an arithmetic number, because the mean of its divisors is an integer number (668258100).

Almost surely, 2^21344444032 is an apocalyptic number.

It is an amenable number.

21344444032 is an abundant number, since it is smaller than the sum of its proper divisors (21424074368).

21344444032 is an equidigital number, since it uses as much as digits as its factorization.

21344444032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21344444032 its reverse (23044444312), we get a palindrome (44388888344).

The spelling of 21344444032 in words is "twenty-one billion, three hundred forty-four million, four hundred forty-four thousand, thirty-two".