18259478879 has 2 divisors, whose sum is σ = 18259478880. Its totient is φ = 18259478878.

The previous prime is 18259478837. The next prime is 18259478903. The reversal of 18259478879 is 97887495281.

It is a strong prime.

It is an emirp because it is prime and its reverse (97887495281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18259478879 - 2¹⁶ = 18259413343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18259474879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9129739439 + 9129739440.

It is an arithmetic number, because the mean of its divisors is an integer number (9129739440).

Almost surely, 2^18259478879 is an apocalyptic number.

18259478879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18259478879 is an equidigital number, since it uses as much as digits as its factorization.

18259478879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81285120, while the sum is 68.

The spelling of 18259478879 in words is "eighteen billion, two hundred fifty-nine million, four hundred seventy-eight thousand, eight hundred seventy-nine".