21184910004 has 12 divisors (see below), whose sum is σ = 49431456704. Its totient is φ = 7061636664.

The previous prime is 21184910003. The next prime is 21184910017. The reversal of 21184910004 is 40001948112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21184910003) by changing a digit.

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, 882704572 + ... + 882704595.

Almost surely, 2^21184910004 is an apocalyptic number.

It is an amenable number.

21184910004 is an abundant number, since it is smaller than the sum of its proper divisors (28246546700).

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

21184910004 is a wasteful number, since it uses less digits than its factorization.

21184910004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765409174 (or 1765409172 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 21184910004 in words is "twenty-one billion, one hundred eighty-four million, nine hundred ten thousand, four".