20210173 has 4 divisors (see below), whose sum is σ = 20331360. Its totient is φ = 20088988.

The previous prime is 20210159. The next prime is 20210189. The reversal of 20210173 is 37101202.

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 a de Polignac number, because none of the positive numbers 2^k-20210173 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 (20210143) 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, 60343 + ... + 60676.

It is an arithmetic number, because the mean of its divisors is an integer number (5082840).

Almost surely, 2^20210173 is an apocalyptic number.

It is an amenable number.

20210173 is a deficient number, since it is larger than the sum of its proper divisors (121187).

20210173 is a wasteful number, since it uses less digits than its factorization.

20210173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121186.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20210173 is about 4495.5725997919. The cubic root of 20210173 is about 272.3892791495.

Adding to 20210173 its reverse (37101202), we get a palindrome (57311375).

The spelling of 20210173 in words is "twenty million, two hundred ten thousand, one hundred seventy-three".