18479000117 has 2 divisors, whose sum is σ = 18479000118. Its totient is φ = 18479000116.

The previous prime is 18479000093. The next prime is 18479000123. The reversal of 18479000117 is 71100097481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18433221361 + 45778756 = 135769^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 18479000117 - 2⁶ = 18479000053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18479000167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9239500058 + 9239500059.

It is an arithmetic number, because the mean of its divisors is an integer number (9239500059).

Almost surely, 2^18479000117 is an apocalyptic number.

It is an amenable number.

18479000117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18479000117 is an equidigital number, since it uses as much as digits as its factorization.

18479000117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 38.

Adding to 18479000117 its reverse (71100097481), we get a palindrome (89579097598).

The spelling of 18479000117 in words is "eighteen billion, four hundred seventy-nine million, one hundred seventeen", and thus it is an aban number.