21704125724 has 6 divisors (see below), whose sum is σ = 37982220024. Its totient is φ = 10852062860.

The previous prime is 21704125711. The next prime is 21704125769. The reversal of 21704125724 is 42752140712.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2713015712 + ... + 2713015719.

It is an arithmetic number, because the mean of its divisors is an integer number (6330370004).

Almost surely, 2^21704125724 is an apocalyptic number.

It is an amenable number.

21704125724 is a deficient number, since it is larger than the sum of its proper divisors (16278094300).

21704125724 is a wasteful number, since it uses less digits than its factorization.

21704125724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426031435 (or 5426031433 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 21704125724 in words is "twenty-one billion, seven hundred four million, one hundred twenty-five thousand, seven hundred twenty-four".