21844459552 has 24 divisors (see below), whose sum is σ = 43030458576. Its totient is φ = 10916089152.

The previous prime is 21844459531. The next prime is 21844459579. The reversal of 21844459552 is 25595444812.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21844459496 and 21844459505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133818 + ... + 248185.

It is an arithmetic number, because the mean of its divisors is an integer number (1792935774).

Almost surely, 2^21844459552 is an apocalyptic number.

It is an amenable number.

21844459552 is a deficient number, since it is larger than the sum of its proper divisors (21185999024).

21844459552 is a wasteful number, since it uses less digits than its factorization.

21844459552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383800 (or 383792 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 49.

The spelling of 21844459552 in words is "twenty-one billion, eight hundred forty-four million, four hundred fifty-nine thousand, five hundred fifty-two".