21595522050 has 192 divisors, whose sum is σ = 61578558720. Its totient is φ = 5561280000.

The previous prime is 21595522021. The next prime is 21595522051. The reversal of 21595522050 is 5022559512.

21595522050 is a `hidden beast` number, since 2 + 1 + 59 + 552 + 2 + 0 + 50 = 666.

It is a super-2 number, since 2×21595522050² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21595521996 and 21595522014.

It is not an unprimeable number, because it can be changed into a prime (21595522051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5588419 + ... + 5592281.

It is an arithmetic number, because the mean of its divisors is an integer number (320721660).

Almost surely, 2^21595522050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21595522050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30789279360).

21595522050 is an abundant number, since it is smaller than the sum of its proper divisors (39983036670).

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

21595522050 is a wasteful number, since it uses less digits than its factorization.

21595522050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 21595522050 in words is "twenty-one billion, five hundred ninety-five million, five hundred twenty-two thousand, fifty".