20123371 has 4 divisors (see below), whose sum is σ = 20772544. Its totient is φ = 19474200.

The previous prime is 20123347. The next prime is 20123377. The reversal of 20123371 is 17332102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17332102 = 2 ⋅8666051.

It is not a de Polignac number, because 20123371 - 2⁵ = 20123339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123377) 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, 324540 + ... + 324601.

It is an arithmetic number, because the mean of its divisors is an integer number (5193136).

Almost surely, 2^20123371 is an apocalyptic number.

20123371 is a deficient number, since it is larger than the sum of its proper divisors (649173).

20123371 is an equidigital number, since it uses as much as digits as its factorization.

20123371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649172.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20123371 is about 4485.9080463157. The cubic root of 20123371 is about 271.9987519767.

Adding to 20123371 its reverse (17332102), we get a palindrome (37455473).

The spelling of 20123371 in words is "twenty million, one hundred twenty-three thousand, three hundred seventy-one".