21326062560 has 192 divisors, whose sum is σ = 73375061760. Its totient is φ = 5163540480.

The previous prime is 21326062489. The next prime is 21326062603. The reversal of 21326062560 is 6526062312.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 5325519 + ... + 5329521.

It is an arithmetic number, because the mean of its divisors is an integer number (382161780).

Almost surely, 2^21326062560 is an apocalyptic number.

21326062560 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 21326062560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36687530880).

21326062560 is an abundant number, since it is smaller than the sum of its proper divisors (52048999200).

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

21326062560 is a wasteful number, since it uses less digits than its factorization.

21326062560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041 (or 5033 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 21326062560 in words is "twenty-one billion, three hundred twenty-six million, sixty-two thousand, five hundred sixty".