18184554728357 has 2 divisors, whose sum is σ = 18184554728358. Its totient is φ = 18184554728356.

The previous prime is 18184554728299. The next prime is 18184554728359. The reversal of 18184554728357 is 75382745548181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13940732245441 + 4243822482916 = 3733729^2 + 2060054^2 .

It is a cyclic number.

It is not a de Polignac number, because 18184554728357 - 2¹⁰ = 18184554727333 is a prime.

It is a super-2 number, since 2×18184554728357² (a number of 27 digits) contains 22 as substring.

Together with 18184554728359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18184554728359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9092277364178 + 9092277364179.

It is an arithmetic number, because the mean of its divisors is an integer number (9092277364179).

Almost surely, 2^{18184554728357} is an apocalyptic number.

It is an amenable number.

18184554728357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18184554728357 is an equidigital number, since it uses as much as digits as its factorization.

18184554728357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056000, while the sum is 68.

The spelling of 18184554728357 in words is "eighteen trillion, one hundred eighty-four billion, five hundred fifty-four million, seven hundred twenty-eight thousand, three hundred fifty-seven".