2120665173 has 16 divisors (see below), whose sum is σ = 3130646016. Its totient is φ = 1266067440.

The previous prime is 2120665171. The next prime is 2120665193. The reversal of 2120665173 is 3715660212.

It is not a de Polignac number, because 2120665173 - 2¹ = 2120665171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120665171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477361 + ... + 481782.

It is an arithmetic number, because the mean of its divisors is an integer number (195665376).

Almost surely, 2^2120665173 is an apocalyptic number.

It is an amenable number.

2120665173 is a deficient number, since it is larger than the sum of its proper divisors (1009980843).

2120665173 is a wasteful number, since it uses less digits than its factorization.

2120665173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959224.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2120665173 is about 46050.6804835716. The cubic root of 2120665173 is about 1284.7659993696.

The spelling of 2120665173 in words is "two billion, one hundred twenty million, six hundred sixty-five thousand, one hundred seventy-three".