18131359 has 2 divisors, whose sum is σ = 18131360. Its totient is φ = 18131358.

The previous prime is 18131303. The next prime is 18131371. The reversal of 18131359 is 95313181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18131359 - 2¹⁹ = 17607071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18131359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18131159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9065679 + 9065680.

It is an arithmetic number, because the mean of its divisors is an integer number (9065680).

Almost surely, 2^18131359 is an apocalyptic number.

18131359 is a deficient number, since it is larger than the sum of its proper divisors (1).

18131359 is an equidigital number, since it uses as much as digits as its factorization.

18131359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 18131359 is about 4258.0933526638. The cubic root of 18131359 is about 262.7101096330.

The spelling of 18131359 in words is "eighteen million, one hundred thirty-one thousand, three hundred fifty-nine".