21104305488 has 480 divisors, whose sum is σ = 75316608000. Its totient is φ = 5628994560.

The previous prime is 21104305483. The next prime is 21104305507. The reversal of 21104305488 is 88450340112.

21104305488 is a `hidden beast` number, since 2 + 1 + 104 + 3 + 0 + 548 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104305483) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19029478 + ... + 19030586.

It is an arithmetic number, because the mean of its divisors is an integer number (156909600).

Almost surely, 2^21104305488 is an apocalyptic number.

21104305488 is a gapful number since it is divisible by the number (28) 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 21104305488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37658304000).

21104305488 is an abundant number, since it is smaller than the sum of its proper divisors (54212302512).

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

21104305488 is a wasteful number, since it uses less digits than its factorization.

21104305488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 21104305488 in words is "twenty-one billion, one hundred four million, three hundred five thousand, four hundred eighty-eight".