20743171 has 8 divisors (see below), whose sum is σ = 22173984. Its totient is φ = 19356480.

The previous prime is 20743103. The next prime is 20743181. The reversal of 20743171 is 17134702.

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 a de Polignac number, because none of the positive numbers 2^k-20743171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20743181) 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, 10056 + ... + 11941.

It is an arithmetic number, because the mean of its divisors is an integer number (2771748).

Almost surely, 2^20743171 is an apocalyptic number.

20743171 is a deficient number, since it is larger than the sum of its proper divisors (1430813).

20743171 is a wasteful number, since it uses less digits than its factorization.

20743171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22061.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20743171 is about 4554.4671477572. The cubic root of 20743171 is about 274.7630841069.

Adding to 20743171 its reverse (17134702), we get a palindrome (37877873).

The spelling of 20743171 in words is "twenty million, seven hundred forty-three thousand, one hundred seventy-one".