21395488592 has 30 divisors (see below), whose sum is σ = 42244315722. Its totient is φ = 10493810496.

The previous prime is 21395488579. The next prime is 21395488619. The reversal of 21395488592 is 29588459312.

It can be written as a sum of positive squares in only one way, i.e., 19780734736 + 1614753856 = 140644^2 + 40184^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4256993 + ... + 4262015.

Almost surely, 2^21395488592 is an apocalyptic number.

It is an amenable number.

21395488592 is a deficient number, since it is larger than the sum of its proper divisors (20848827130).

21395488592 is an frugal number, since it uses more digits than its factorization.

21395488592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10107 (or 5078 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 56.

The spelling of 21395488592 in words is "twenty-one billion, three hundred ninety-five million, four hundred eighty-eight thousand, five hundred ninety-two".