18254712139 has 2 divisors, whose sum is σ = 18254712140. Its totient is φ = 18254712138.

The previous prime is 18254712017. The next prime is 18254712191. The reversal of 18254712139 is 93121745281.

It is a strong prime.

It is an emirp because it is prime and its reverse (93121745281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18254712139 - 2⁷ = 18254712011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18254712095 and 18254712104.

It is not a weakly prime, because it can be changed into another prime (18254710139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9127356069 + 9127356070.

It is an arithmetic number, because the mean of its divisors is an integer number (9127356070).

Almost surely, 2^18254712139 is an apocalyptic number.

18254712139 is a deficient number, since it is larger than the sum of its proper divisors (1).

18254712139 is an equidigital number, since it uses as much as digits as its factorization.

18254712139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The spelling of 18254712139 in words is "eighteen billion, two hundred fifty-four million, seven hundred twelve thousand, one hundred thirty-nine".