18504086948117 has 16 divisors (see below), whose sum is σ = 18591564419568. Its totient is φ = 18416790213120.

The previous prime is 18504086948099. The next prime is 18504086948131. The reversal of 18504086948117 is 71184968040581.

It can be written as a sum of positive squares in 8 ways, for example, as 1916012408401 + 16588074539716 = 1384201^2 + 4072846^2 .

It is a cyclic number.

It is not a de Polignac number, because 18504086948117 - 2⁸ = 18504086947861 is a prime.

It is a super-2 number, since 2×18504086948117² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18504086948117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18504086948917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818282903 + ... + 818305515.

It is an arithmetic number, because the mean of its divisors is an integer number (1161972776223).

Almost surely, 2^{18504086948117} is an apocalyptic number.

It is an amenable number.

18504086948117 is a deficient number, since it is larger than the sum of its proper divisors (87477471451).

18504086948117 is a wasteful number, since it uses less digits than its factorization.

18504086948117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26440.

The product of its (nonzero) digits is 15482880, while the sum is 62.

The spelling of 18504086948117 in words is "eighteen trillion, five hundred four billion, eighty-six million, nine hundred forty-eight thousand, one hundred seventeen".