21082928896 has 144 divisors (see below), whose sum is σ = 46044893664. Its totient is φ = 9595256832.

The previous prime is 21082928873. The next prime is 21082928897. The reversal of 21082928896 is 69882928012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082928897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21145870 + ... + 21146866.

It is an arithmetic number, because the mean of its divisors is an integer number (319756206).

Almost surely, 2^21082928896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21082928896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23022446832).

21082928896 is an abundant number, since it is smaller than the sum of its proper divisors (24961964768).

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

21082928896 is a wasteful number, since it uses less digits than its factorization.

21082928896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 21082928896 in words is "twenty-one billion, eighty-two million, nine hundred twenty-eight thousand, eight hundred ninety-six".