20123173 has 12 divisors (see below), whose sum is σ = 23484000. Its totient is φ = 17192952.

The previous prime is 20123171. The next prime is 20123177. The reversal of 20123173 is 37132102.

It is not a de Polignac number, because 20123173 - 2¹ = 20123171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123171) 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 11 ways as a sum of consecutive naturals, for example, 24040 + ... + 24862.

It is an arithmetic number, because the mean of its divisors is an integer number (1957000).

Almost surely, 2^20123173 is an apocalyptic number.

It is an amenable number.

20123173 is a deficient number, since it is larger than the sum of its proper divisors (3360827).

20123173 is an equidigital number, since it uses as much as digits as its factorization.

20123173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20123173 is about 4485.8859771510. The cubic root of 20123173 is about 271.9978598808.

Adding to 20123173 its reverse (37132102), we get a palindrome (57255275).

The spelling of 20123173 in words is "twenty million, one hundred twenty-three thousand, one hundred seventy-three".