18843822553 has 2 divisors, whose sum is σ = 18843822554. Its totient is φ = 18843822552.

The previous prime is 18843822539. The next prime is 18843822607. The reversal of 18843822553 is 35522834881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11936218009 + 6907604544 = 109253^2 + 83112^2 .

It is a cyclic number.

It is not a de Polignac number, because 18843822553 - 2²⁵ = 18810268121 is a prime.

It is a super-3 number, since 3×18843822553³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18843822497 and 18843822506.

It is not a weakly prime, because it can be changed into another prime (18843822653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9421911276 + 9421911277.

It is an arithmetic number, because the mean of its divisors is an integer number (9421911277).

Almost surely, 2^18843822553 is an apocalyptic number.

It is an amenable number.

18843822553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18843822553 is an equidigital number, since it uses as much as digits as its factorization.

18843822553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843200, while the sum is 49.

The spelling of 18843822553 in words is "eighteen billion, eight hundred forty-three million, eight hundred twenty-two thousand, five hundred fifty-three".