22021616505650 has 48 divisors (see below), whose sum is σ = 41633072608200. Its totient is φ = 8663953881600.

The previous prime is 22021616505643. The next prime is 22021616505667. The reversal of 22021616505650 is 5650561612022.

It can be written as a sum of positive squares in 12 ways, for example, as 1796026145281 + 20225590360369 = 1340159^2 + 4497287^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22021616505598 and 22021616505607.

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, 107101742 + ... + 107307158.

Almost surely, 2^{22021616505650} is an apocalyptic number.

22021616505650 is a deficient number, since it is larger than the sum of its proper divisors (19611456102550).

22021616505650 is a wasteful number, since it uses less digits than its factorization.

22021616505650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240639 (or 240634 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 22021616505650 in words is "twenty-two trillion, twenty-one billion, six hundred sixteen million, five hundred five thousand, six hundred fifty".