21204583296 has 256 divisors, whose sum is σ = 62972743680. Its totient is φ = 6277939200.

The previous prime is 21204583291. The next prime is 21204583409. The reversal of 21204583296 is 69238540212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204583291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40699516 + ... + 40700036.

It is an arithmetic number, because the mean of its divisors is an integer number (245987280).

Almost surely, 2^21204583296 is an apocalyptic number.

21204583296 is a gapful number since it is divisible by the number (26) 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 21204583296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31486371840).

21204583296 is an abundant number, since it is smaller than the sum of its proper divisors (41768160384).

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

21204583296 is a wasteful number, since it uses less digits than its factorization.

21204583296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 21204583296 in words is "twenty-one billion, two hundred four million, five hundred eighty-three thousand, two hundred ninety-six".