20070173 has 4 divisors (see below), whose sum is σ = 20277180. Its totient is φ = 19863168.

The previous prime is 20070161. The next prime is 20070179. The reversal of 20070173 is 37107002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37107002 = 2 ⋅18553501.

It can be written as a sum of positive squares in 2 ways, for example, as 8421604 + 11648569 = 2902^2 + 3413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20070173 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 (20070179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103358 + ... + 103551.

It is an arithmetic number, because the mean of its divisors is an integer number (5069295).

Almost surely, 2^20070173 is an apocalyptic number.

It is an amenable number.

20070173 is a deficient number, since it is larger than the sum of its proper divisors (207007).

20070173 is an equidigital number, since it uses as much as digits as its factorization.

20070173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207006.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 20070173 is about 4479.9746651069. The cubic root of 20070173 is about 271.7588558030.

Adding to 20070173 its reverse (37107002), we get a palindrome (57177175).

The spelling of 20070173 in words is "twenty million, seventy thousand, one hundred seventy-three".