1820170173 has 16 divisors (see below), whose sum is σ = 2465228480. Its totient is φ = 1194310656.

The previous prime is 1820170171. The next prime is 1820170273. The reversal of 1820170173 is 3710710281.

It is not a de Polignac number, because 1820170173 - 2¹ = 1820170171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820170173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820170171) 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, 284061 + ... + 290397.

It is an arithmetic number, because the mean of its divisors is an integer number (154076780).

Almost surely, 2^1820170173 is an apocalyptic number.

It is an amenable number.

1820170173 is a deficient number, since it is larger than the sum of its proper divisors (645058307).

1820170173 is a wasteful number, since it uses less digits than its factorization.

1820170173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7836.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 1820170173 is about 42663.4524271067. The cubic root of 1820170173 is about 1220.9672015235.

The spelling of 1820170173 in words is "one billion, eight hundred twenty million, one hundred seventy thousand, one hundred seventy-three".