18131147705 has 32 divisors (see below), whose sum is σ = 24003302400. Its totient is φ = 13038252480.

The previous prime is 18131147701. The next prime is 18131147737. The reversal of 18131147705 is 50774113181.

It is not a de Polignac number, because 18131147705 - 2² = 18131147701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18131147701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1778954 + ... + 1789116.

It is an arithmetic number, because the mean of its divisors is an integer number (750103200).

Almost surely, 2^18131147705 is an apocalyptic number.

It is an amenable number.

18131147705 is a deficient number, since it is larger than the sum of its proper divisors (5872154695).

18131147705 is a wasteful number, since it uses less digits than its factorization.

18131147705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10541.

The product of its (nonzero) digits is 23520, while the sum is 38.

The spelling of 18131147705 in words is "eighteen billion, one hundred thirty-one million, one hundred forty-seven thousand, seven hundred five".