21466798328 has 16 divisors (see below), whose sum is σ = 40520385000. Its totient is φ = 10661362336.

The previous prime is 21466798321. The next prime is 21466798333. The reversal of 21466798328 is 82389766412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466798321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9003338 + ... + 9005721.

Almost surely, 2^21466798328 is an apocalyptic number.

It is an amenable number.

21466798328 is a deficient number, since it is larger than the sum of its proper divisors (19053586672).

21466798328 is a wasteful number, since it uses less digits than its factorization.

21466798328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18009214 (or 18009210 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 56.

The spelling of 21466798328 in words is "twenty-one billion, four hundred sixty-six million, seven hundred ninety-eight thousand, three hundred twenty-eight".