22217284718738 has 6 divisors (see below), whose sum is σ = 33325937076999. Its totient is φ = 11108639026406.

The previous prime is 22217284718737. The next prime is 22217284718773. The reversal of 22217284718738 is 83781748271222.

It can be written as a sum of positive squares in only one way, i.e., 11108642359369 + 11108642359369 = 3332963^2 + 3332963^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3332963.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22217284718737) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4999445 + ... + 8332407.

Almost surely, 2^{22217284718738} is an apocalyptic number.

22217284718738 is a deficient number, since it is larger than the sum of its proper divisors (11108652358261).

22217284718738 is an frugal number, since it uses more digits than its factorization.

22217284718738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665928 (or 3332965 counting only the distinct ones).

The product of its digits is 33718272, while the sum is 62.

The spelling of 22217284718738 in words is "twenty-two trillion, two hundred seventeen billion, two hundred eighty-four million, seven hundred eighteen thousand, seven hundred thirty-eight".