21524751604992 has 72 divisors (see below), whose sum is σ = 57324650840800. Its totient is φ = 7170230384640.

The previous prime is 21524751604933. The next prime is 21524751605017. The reversal of 21524751604992 is 29940615742512.

21524751604992 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7977367 + ... + 10328982.

Almost surely, 2^{21524751604992} is an apocalyptic number.

It is an amenable number.

21524751604992 is an abundant number, since it is smaller than the sum of its proper divisors (35799899235808).

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

21524751604992 is a wasteful number, since it uses less digits than its factorization.

21524751604992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18307899 (or 18307885 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 21524751604992 in words is "twenty-one trillion, five hundred twenty-four billion, seven hundred fifty-one million, six hundred four thousand, nine hundred ninety-two".