20340173 has 4 divisors (see below), whose sum is σ = 23245920. Its totient is φ = 17434428.

The previous prime is 20340167. The next prime is 20340179. The reversal of 20340173 is 37104302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20340167) and next prime (20340179).

It is a cyclic number.

It is not a de Polignac number, because 20340173 - 2¹⁰ = 20339149 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 (20340179) 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, 1452863 + ... + 1452876.

It is an arithmetic number, because the mean of its divisors is an integer number (5811480).

Almost surely, 2^20340173 is an apocalyptic number.

It is an amenable number.

20340173 is a deficient number, since it is larger than the sum of its proper divisors (2905747).

20340173 is an equidigital number, since it uses as much as digits as its factorization.

20340173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905746.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20340173 is about 4510.0080931191. The cubic root of 20340173 is about 272.9720706533.

Adding to 20340173 its reverse (37104302), we get a palindrome (57444475).

The spelling of 20340173 in words is "twenty million, three hundred forty thousand, one hundred seventy-three".