21332842496 has 288 divisors, whose sum is σ = 54711820800. Its totient is φ = 8121876480.

The previous prime is 21332842481. The next prime is 21332842501. The reversal of 21332842496 is 69424823312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78718841 + ... + 78719111.

It is an arithmetic number, because the mean of its divisors is an integer number (189971600).

Almost surely, 2^21332842496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21332842496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27355910400).

21332842496 is an abundant number, since it is smaller than the sum of its proper divisors (33378978304).

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

21332842496 is a wasteful number, since it uses less digits than its factorization.

21332842496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 316 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The spelling of 21332842496 in words is "twenty-one billion, three hundred thirty-two million, eight hundred forty-two thousand, four hundred ninety-six".