21822971076 has 135 divisors (see below), whose sum is σ = 59294135901. Its totient is φ = 6998666976.

The previous prime is 21822971041. The next prime is 21822971087. The reversal of 21822971076 is 67017922812.

It is a happy number.

The square root of 21822971076 is 147726.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11443436676 + 10379534400 = 106974^2 + 101880^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 77112831 + ... + 77113113.

Almost surely, 2^21822971076 is an apocalyptic number.

21822971076 is the 147726-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21822971076

21822971076 is an abundant number, since it is smaller than the sum of its proper divisors (37471164825).

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

21822971076 is an equidigital number, since it uses as much as digits as its factorization.

21822971076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 21822971076 in words is "twenty-one billion, eight hundred twenty-two million, nine hundred seventy-one thousand, seventy-six".