21832558722 has 270 divisors, whose sum is σ = 57123426393. Its totient is φ = 6228739296.

The previous prime is 21832558721. The next prime is 21832558733. The reversal of 21832558722 is 22785523812.

21832558722 is a `hidden beast` number, since 2 + 18 + 32 + 5 + 587 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18667483641 + 3165075081 = 136629^2 + 56259^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104481.

Its product of digits (537600) is a multiple of the sum of its prime divisors (84).

It is not an unprimeable number, because it can be changed into a prime (21832558721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 464522503 + ... + 464522549.

Almost surely, 2^21832558722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21832558722

21832558722 is an abundant number, since it is smaller than the sum of its proper divisors (35290867671).

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

21832558722 is a wasteful number, since it uses less digits than its factorization.

21832558722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 84 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 21832558722 in words is "twenty-one billion, eight hundred thirty-two million, five hundred fifty-eight thousand, seven hundred twenty-two".