18310317129 has 12 divisors (see below), whose sum is σ = 28482715716. Its totient is φ = 11267887392.

The previous prime is 18310317127. The next prime is 18310317139. The reversal of 18310317129 is 92171301381.

18310317129 is a `hidden beast` number, since 1 + 8 + 310 + 317 + 1 + 29 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8037481104 + 10272836025 = 89652^2 + 101355^2 .

It is not a de Polignac number, because 18310317129 - 2¹ = 18310317127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18310317093 and 18310317102.

It is not an unprimeable number, because it can be changed into a prime (18310317127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78249102 + ... + 78249335.

It is an arithmetic number, because the mean of its divisors is an integer number (2373559643).

Almost surely, 2^18310317129 is an apocalyptic number.

It is an amenable number.

18310317129 is a deficient number, since it is larger than the sum of its proper divisors (10172398587).

18310317129 is a wasteful number, since it uses less digits than its factorization.

18310317129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156498456 (or 156498453 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 18310317129 in words is "eighteen billion, three hundred ten million, three hundred seventeen thousand, one hundred twenty-nine".