18282139 has 2 divisors, whose sum is σ = 18282140. Its totient is φ = 18282138.

The previous prime is 18282137. The next prime is 18282149. The reversal of 18282139 is 93128281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18282139 - 2¹ = 18282137 is a prime.

Together with 18282137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18282133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9141069 + 9141070.

It is an arithmetic number, because the mean of its divisors is an integer number (9141070).

Almost surely, 2^18282139 is an apocalyptic number.

18282139 is a deficient number, since it is larger than the sum of its proper divisors (1).

18282139 is an equidigital number, since it uses as much as digits as its factorization.

18282139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 18282139 is about 4275.7618034685. The cubic root of 18282139 is about 263.4363308393.

The spelling of 18282139 in words is "eighteen million, two hundred eighty-two thousand, one hundred thirty-nine".