21082043288 has 8 divisors (see below), whose sum is σ = 39528831180. Its totient is φ = 10541021640.

The previous prime is 21082043273. The next prime is 21082043291. The reversal of 21082043288 is 88234028012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1317627698 + ... + 1317627713.

Almost surely, 2^21082043288 is an apocalyptic number.

It is an amenable number.

21082043288 is a deficient number, since it is larger than the sum of its proper divisors (18446787892).

21082043288 is a wasteful number, since it uses less digits than its factorization.

21082043288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635255417 (or 2635255413 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The spelling of 21082043288 in words is "twenty-one billion, eighty-two million, forty-three thousand, two hundred eighty-eight".