20530173 has 8 divisors (see below), whose sum is σ = 28317600. Its totient is φ = 13214768.

The previous prime is 20530163. The next prime is 20530177. The reversal of 20530173 is 37103502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20530173 - 2⁴ = 20530157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117903 + ... + 118076.

It is an arithmetic number, because the mean of its divisors is an integer number (3539700).

Almost surely, 2^20530173 is an apocalyptic number.

It is an amenable number.

20530173 is a deficient number, since it is larger than the sum of its proper divisors (7787427).

20530173 is a wasteful number, since it uses less digits than its factorization.

20530173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236011.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 20530173 is about 4531.0233943338. The cubic root of 20530173 is about 273.8193927624.

Adding to 20530173 its reverse (37103502), we get a palindrome (57633675).

The spelling of 20530173 in words is "twenty million, five hundred thirty thousand, one hundred seventy-three".