18173123705 has 24 divisors (see below), whose sum is σ = 25232121600. Its totient is φ = 12521187360.

The previous prime is 18173123693. The next prime is 18173123711. The reversal of 18173123705 is 50732137181.

It is a de Polignac number, because none of the positive numbers 2^k-18173123705 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 778985 + ... + 801974.

It is an arithmetic number, because the mean of its divisors is an integer number (1051338400).

Almost surely, 2^18173123705 is an apocalyptic number.

It is an amenable number.

18173123705 is a deficient number, since it is larger than the sum of its proper divisors (7058997895).

18173123705 is a wasteful number, since it uses less digits than its factorization.

18173123705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581005 (or 1580994 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 18173123705 in words is "eighteen billion, one hundred seventy-three million, one hundred twenty-three thousand, seven hundred five".