20147173 has 4 divisors (see below), whose sum is σ = 20431008. Its totient is φ = 19863340.

The previous prime is 20147147. The next prime is 20147189. The reversal of 20147173 is 37174102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20147173 - 2¹³ = 20138981 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 (20147273) 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, 141811 + ... + 141952.

It is an arithmetic number, because the mean of its divisors is an integer number (5107752).

Almost surely, 2^20147173 is an apocalyptic number.

It is an amenable number.

20147173 is a deficient number, since it is larger than the sum of its proper divisors (283835).

20147173 is an equidigital number, since it uses as much as digits as its factorization.

20147173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283834.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20147173 is about 4488.5602368688. The cubic root of 20147173 is about 272.1059501102.

It can be divided in two parts, 201 and 47173, that added together give a palindrome (47374).

The spelling of 20147173 in words is "twenty million, one hundred forty-seven thousand, one hundred seventy-three".