18471438079 has 2 divisors, whose sum is σ = 18471438080. Its totient is φ = 18471438078.

The previous prime is 18471438059. The next prime is 18471438113. The reversal of 18471438079 is 97083417481.

It is a weak prime.

It is an emirp because it is prime and its reverse (97083417481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18471438079 - 2¹⁵ = 18471405311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18471438049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9235719039 + 9235719040.

It is an arithmetic number, because the mean of its divisors is an integer number (9235719040).

Almost surely, 2^18471438079 is an apocalyptic number.

18471438079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18471438079 is an equidigital number, since it uses as much as digits as its factorization.

18471438079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 18471438079 in words is "eighteen billion, four hundred seventy-one million, four hundred thirty-eight thousand, seventy-nine".