18190138222073 has 2 divisors, whose sum is σ = 18190138222074. Its totient is φ = 18190138222072.

The previous prime is 18190138222051. The next prime is 18190138222111. The reversal of 18190138222073 is 37022283109181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12812734342144 + 5377403879929 = 3579488^2 + 2318923^2 .

It is a cyclic number.

It is not a de Polignac number, because 18190138222073 - 2¹⁴ = 18190138205689 is a prime.

It is a super-2 number, since 2×18190138222073² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18190138222673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9095069111036 + 9095069111037.

It is an arithmetic number, because the mean of its divisors is an integer number (9095069111037).

Almost surely, 2^{18190138222073} is an apocalyptic number.

It is an amenable number.

18190138222073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18190138222073 is an equidigital number, since it uses as much as digits as its factorization.

18190138222073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 18190138222073 in words is "eighteen trillion, one hundred ninety billion, one hundred thirty-eight million, two hundred twenty-two thousand, seventy-three".