20342134221 has 8 divisors (see below), whose sum is σ = 27160571520. Its totient is φ = 13542559872.

The previous prime is 20342134213. The next prime is 20342134289. The reversal of 20342134221 is 12243124302.

It is a happy number.

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

It is not a de Polignac number, because 20342134221 - 2³ = 20342134213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20342134191 and 20342134200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342134291) 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, 4713220 + ... + 4717533.

It is an arithmetic number, because the mean of its divisors is an integer number (3395071440).

Almost surely, 2^20342134221 is an apocalyptic number.

It is an amenable number.

20342134221 is a deficient number, since it is larger than the sum of its proper divisors (6818437299).

20342134221 is an equidigital number, since it uses as much as digits as its factorization.

20342134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431475.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20342134221 its reverse (12243124302), we get a palindrome (32585258523).

The spelling of 20342134221 in words is "twenty billion, three hundred forty-two million, one hundred thirty-four thousand, two hundred twenty-one".