18287251139 has 2 divisors, whose sum is σ = 18287251140. Its totient is φ = 18287251138.

The previous prime is 18287251117. The next prime is 18287251181. The reversal of 18287251139 is 93115278281.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18287251139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18287251093 and 18287251102.

It is not a weakly prime, because it can be changed into another prime (18287251109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9143625569 + 9143625570.

It is an arithmetic number, because the mean of its divisors is an integer number (9143625570).

Almost surely, 2^18287251139 is an apocalyptic number.

18287251139 is a deficient number, since it is larger than the sum of its proper divisors (1).

18287251139 is an equidigital number, since it uses as much as digits as its factorization.

18287251139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 47.

The spelling of 18287251139 in words is "eighteen billion, two hundred eighty-seven million, two hundred fifty-one thousand, one hundred thirty-nine".