20023271 has 4 divisors (see below), whose sum is σ = 20893872. Its totient is φ = 19152672.

The previous prime is 20023259. The next prime is 20023273. The reversal of 20023271 is 17232002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20023271 - 2¹⁴ = 20006887 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 (20023273) 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, 435266 + ... + 435311.

It is an arithmetic number, because the mean of its divisors is an integer number (5223468).

Almost surely, 2^20023271 is an apocalyptic number.

20023271 is a deficient number, since it is larger than the sum of its proper divisors (870601).

20023271 is an equidigital number, since it uses as much as digits as its factorization.

20023271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870600.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20023271 is about 4474.7369755104. The cubic root of 20023271 is about 271.5469995408.

Adding to 20023271 its reverse (17232002), we get a palindrome (37255273).

The spelling of 20023271 in words is "twenty million, twenty-three thousand, two hundred seventy-one".