21044051244 has 18 divisors (see below), whose sum is σ = 53194685180. Its totient is φ = 7014683736.

The previous prime is 21044051131. The next prime is 21044051269. The reversal of 21044051244 is 44215044012.

21044051244 is a `hidden beast` number, since 2 + 10 + 4 + 405 + 1 + 244 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 292278454 + ... + 292278525.

Almost surely, 2^21044051244 is an apocalyptic number.

It is an amenable number.

21044051244 is an abundant number, since it is smaller than the sum of its proper divisors (32150633936).

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

21044051244 is a wasteful number, since it uses less digits than its factorization.

21044051244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584556989 (or 584556984 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 21044051244 its reverse (44215044012), we get a palindrome (65259095256).

The spelling of 21044051244 in words is "twenty-one billion, forty-four million, fifty-one thousand, two hundred forty-four".