18002225173 has 8 divisors (see below), whose sum is σ = 18093994200. Its totient is φ = 17910571008.

The previous prime is 18002225167. The next prime is 18002225209. The reversal of 18002225173 is 37152220081.

It can be written as a sum of positive squares in 4 ways, for example, as 62837329 + 17939387844 = 7927^2 + 133938^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18002225173 - 2⁹ = 18002224661 is a prime.

It is a super-2 number, since 2×18002225173² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18002225873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294765 + ... + 350557.

It is an arithmetic number, because the mean of its divisors is an integer number (2261749275).

Almost surely, 2^18002225173 is an apocalyptic number.

It is an amenable number.

18002225173 is a deficient number, since it is larger than the sum of its proper divisors (91769027).

18002225173 is a wasteful number, since it uses less digits than its factorization.

18002225173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57431.

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 18002225173 in words is "eighteen billion, two million, two hundred twenty-five thousand, one hundred seventy-three".