18022566522081 has 24 divisors (see below), whose sum is σ = 26486812658880. Its totient is φ = 10892341973920.

The previous prime is 18022566522013. The next prime is 18022566522089.

18022566522081 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-18022566522081 is a prime.

It is a super-2 number, since 2×18022566522081² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18022566522081.

It is not an unprimeable number, because it can be changed into a prime (18022566522089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69018630 + ... + 69279263.

It is an arithmetic number, because the mean of its divisors is an integer number (1103617194120).

Almost surely, 2^{18022566522081} is an apocalyptic number.

18022566522081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18022566522081 is a deficient number, since it is larger than the sum of its proper divisors (8464246136799).

18022566522081 is a wasteful number, since it uses less digits than its factorization.

18022566522081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138298277 (or 138298266 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 18022566522081 in words is "eighteen trillion, twenty-two billion, five hundred sixty-six million, five hundred twenty-two thousand, eighty-one".