20442134221 has 8 divisors (see below), whose sum is σ = 20466320000. Its totient is φ = 20417965920.

The previous prime is 20442134213. The next prime is 20442134243. The reversal of 20442134221 is 12243124402.

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

It is a cyclic number.

It is not a de Polignac number, because 20442134221 - 2³ = 20442134213 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 (20442134201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5628076 + ... + 5631706.

It is an arithmetic number, because the mean of its divisors is an integer number (2558290000).

Almost surely, 2^20442134221 is an apocalyptic number.

It is an amenable number.

20442134221 is a deficient number, since it is larger than the sum of its proper divisors (24185779).

20442134221 is a wasteful number, since it uses less digits than its factorization.

20442134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8739.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20442134221 its reverse (12243124402), we get a palindrome (32685258623).

The spelling of 20442134221 in words is "twenty billion, four hundred forty-two million, one hundred thirty-four thousand, two hundred twenty-one".