21603333480 has 128 divisors (see below), whose sum is σ = 65789539200. Its totient is φ = 5674447872.

The previous prime is 21603333473. The next prime is 21603333509. The reversal of 21603333480 is 8433330612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2258067 + ... + 2267613.

It is an arithmetic number, because the mean of its divisors is an integer number (513980775).

Almost surely, 2^21603333480 is an apocalyptic number.

21603333480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21603333480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32894769600).

21603333480 is an abundant number, since it is smaller than the sum of its proper divisors (44186205720).

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

21603333480 is a wasteful number, since it uses less digits than its factorization.

21603333480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9843 (or 9839 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The spelling of 21603333480 in words is "twenty-one billion, six hundred three million, three hundred thirty-three thousand, four hundred eighty".