18518078248 has 8 divisors (see below), whose sum is σ = 34721396730. Its totient is φ = 9259039120.

The previous prime is 18518078221. The next prime is 18518078351. The reversal of 18518078248 is 84287081581.

It can be written as a sum of positive squares in only one way, i.e., 17971547364 + 546530884 = 134058^2 + 23378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 18518078195 and 18518078204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157379883 + ... + 1157379898.

Almost surely, 2^18518078248 is an apocalyptic number.

It is an amenable number.

18518078248 is a deficient number, since it is larger than the sum of its proper divisors (16203318482).

18518078248 is a wasteful number, since it uses less digits than its factorization.

18518078248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314759787 (or 2314759783 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 52.

The spelling of 18518078248 in words is "eighteen billion, five hundred eighteen million, seventy-eight thousand, two hundred forty-eight".