21828016168 has 32 divisors (see below), whose sum is σ = 46855454400. Its totient is φ = 9338637312.

The previous prime is 21828016159. The next prime is 21828016187. The reversal of 21828016168 is 86161082812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305458 + ... + 370081.

It is an arithmetic number, because the mean of its divisors is an integer number (1464232950).

Almost surely, 2^21828016168 is an apocalyptic number.

21828016168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21828016168 is an abundant number, since it is smaller than the sum of its proper divisors (25027438232).

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

21828016168 is a wasteful number, since it uses less digits than its factorization.

21828016168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676129 (or 676125 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 43.

The spelling of 21828016168 in words is "twenty-one billion, eight hundred twenty-eight million, sixteen thousand, one hundred sixty-eight".