18120702173 has 16 divisors (see below), whose sum is σ = 22210657920. Its totient is φ = 14436916416.

The previous prime is 18120702157. The next prime is 18120702209. The reversal of 18120702173 is 37120702181.

It is a cyclic number.

It is not a de Polignac number, because 18120702173 - 2⁴ = 18120702157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18120702143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1278290 + ... + 1292387.

It is an arithmetic number, because the mean of its divisors is an integer number (1388166120).

Almost surely, 2^18120702173 is an apocalyptic number.

It is an amenable number.

18120702173 is a deficient number, since it is larger than the sum of its proper divisors (4089955747).

18120702173 is a wasteful number, since it uses less digits than its factorization.

18120702173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570756.

The product of its (nonzero) digits is 4704, while the sum is 32.

The spelling of 18120702173 in words is "eighteen billion, one hundred twenty million, seven hundred two thousand, one hundred seventy-three".