21427425704 has 16 divisors (see below), whose sum is σ = 40319404020. Its totient is φ = 10675584640.

The previous prime is 21427425671. The next prime is 21427425707. The reversal of 21427425704 is 40752472412.

It can be written as a sum of positive squares in 2 ways, for example, as 21394912900 + 32512804 = 146270^2 + 5702^2 .

It is not an unprimeable number, because it can be changed into a prime (21427425707) 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, 4763639 + ... + 4768134.

Almost surely, 2^21427425704 is an apocalyptic number.

It is an amenable number.

21427425704 is a deficient number, since it is larger than the sum of its proper divisors (18891978316).

21427425704 is a wasteful number, since it uses less digits than its factorization.

21427425704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9532060 (or 9532056 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 38.

The spelling of 21427425704 in words is "twenty-one billion, four hundred twenty-seven million, four hundred twenty-five thousand, seven hundred four".