20740173 has 8 divisors (see below), whose sum is σ = 27688608. Its totient is φ = 13809264.

The previous prime is 20740163. The next prime is 20740177. The reversal of 20740173 is 37104702.

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

It is not a de Polignac number, because 20740173 - 2⁹ = 20739661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (3461076).

Almost surely, 2^20740173 is an apocalyptic number.

It is an amenable number.

20740173 is a deficient number, since it is larger than the sum of its proper divisors (6948435).

20740173 is an equidigital number, since it uses as much as digits as its factorization.

20740173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8763.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20740173 is about 4554.1380084490. The cubic root of 20740173 is about 274.7498463460.

Adding to 20740173 its reverse (37104702), we get a palindrome (57844875).

The spelling of 20740173 in words is "twenty million, seven hundred forty thousand, one hundred seventy-three".