18173123706 has 16 divisors (see below), whose sum is σ = 36611550144. Its totient is φ = 6013490784.

The previous prime is 18173123693. The next prime is 18173123711. The reversal of 18173123706 is 60732137181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11053390 + ... + 11055033.

It is an arithmetic number, because the mean of its divisors is an integer number (2288221884).

Almost surely, 2^18173123706 is an apocalyptic number.

18173123706 is an abundant number, since it is smaller than the sum of its proper divisors (18438426438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18173123706 is a wasteful number, since it uses less digits than its factorization.

18173123706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22108565.

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 18173123706 in words is "eighteen billion, one hundred seventy-three million, one hundred twenty-three thousand, seven hundred six".