21300224044 has 12 divisors (see below), whose sum is σ = 40664064168. Its totient is φ = 9681920000.

The previous prime is 21300224039. The next prime is 21300224059. The reversal of 21300224044 is 44042200312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 242047957 + ... + 242048044.

It is an arithmetic number, because the mean of its divisors is an integer number (3388672014).

Almost surely, 2^21300224044 is an apocalyptic number.

It is an amenable number.

21300224044 is a deficient number, since it is larger than the sum of its proper divisors (19363840124).

21300224044 is a wasteful number, since it uses less digits than its factorization.

21300224044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484096016 (or 484096014 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21300224044 its reverse (44042200312), we get a palindrome (65342424356).

The spelling of 21300224044 in words is "twenty-one billion, three hundred million, two hundred twenty-four thousand, forty-four".