20023173 has 8 divisors (see below), whose sum is σ = 29664000. Its totient is φ = 13348764.

The previous prime is 20023163. The next prime is 20023187. The reversal of 20023173 is 37132002.

It is not a de Polignac number, because 20023173 - 2⁵ = 20023141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370773 + ... + 370826.

It is an arithmetic number, because the mean of its divisors is an integer number (3708000).

Almost surely, 2^20023173 is an apocalyptic number.

It is an amenable number.

20023173 is a deficient number, since it is larger than the sum of its proper divisors (9640827).

20023173 is an equidigital number, since it uses as much as digits as its factorization.

20023173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741608 (or 741602 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20023173 is about 4474.7260251327. The cubic root of 20023173 is about 271.5465565288.

Adding to 20023173 its reverse (37132002), we get a palindrome (57155175).

The spelling of 20023173 in words is "twenty million, twenty-three thousand, one hundred seventy-three".