18121367279 has 2 divisors, whose sum is σ = 18121367280. Its totient is φ = 18121367278.

The previous prime is 18121367267. The next prime is 18121367281. The reversal of 18121367279 is 97276312181.

It is a strong prime.

It is an emirp because it is prime and its reverse (97276312181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18121367279 - 2⁴ = 18121367263 is a prime.

Together with 18121367281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18121307279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9060683639 + 9060683640.

It is an arithmetic number, because the mean of its divisors is an integer number (9060683640).

Almost surely, 2^18121367279 is an apocalyptic number.

18121367279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18121367279 is an equidigital number, since it uses as much as digits as its factorization.

18121367279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The spelling of 18121367279 in words is "eighteen billion, one hundred twenty-one million, three hundred sixty-seven thousand, two hundred seventy-nine".