18084123157 has 2 divisors, whose sum is σ = 18084123158. Its totient is φ = 18084123156.

The previous prime is 18084123151. The next prime is 18084123173. The reversal of 18084123157 is 75132148081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18073844721 + 10278436 = 134439^2 + 3206^2 .

It is an emirp because it is prime and its reverse (75132148081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18084123157 - 2³ = 18084123149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18084123151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9042061578 + 9042061579.

It is an arithmetic number, because the mean of its divisors is an integer number (9042061579).

Almost surely, 2^18084123157 is an apocalyptic number.

It is an amenable number.

18084123157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18084123157 is an equidigital number, since it uses as much as digits as its factorization.

18084123157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 18084123157 in words is "eighteen billion, eighty-four million, one hundred twenty-three thousand, one hundred fifty-seven".