21184100044 has 48 divisors (see below), whose sum is σ = 41420030400. Its totient is φ = 9428350976.

The previous prime is 21184100039. The next prime is 21184100057. The reversal of 21184100044 is 44000148112.

It is a junction number, because it is equal to n+sod(n) for n = 21184099991 and 21184100018.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63102 + ... + 215290.

It is an arithmetic number, because the mean of its divisors is an integer number (862917300).

Almost surely, 2^21184100044 is an apocalyptic number.

It is an amenable number.

21184100044 is a deficient number, since it is larger than the sum of its proper divisors (20235930356).

21184100044 is a wasteful number, since it uses less digits than its factorization.

21184100044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152322 (or 152320 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 21184100044 its reverse (44000148112), we get a palindrome (65184248156).

The spelling of 21184100044 in words is "twenty-one billion, one hundred eighty-four million, one hundred thousand, forty-four".