20134204221 has 16 divisors (see below), whose sum is σ = 28324131840. Its totient is φ = 12686819760.

The previous prime is 20134204219. The next prime is 20134204247. The reversal of 20134204221 is 12240243102.

It is not a de Polignac number, because 20134204221 - 2¹ = 20134204219 is a prime.

It is a super-2 number, since 2×20134204221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134204721) 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 15 ways as a sum of consecutive naturals, for example, 385215 + ... + 434348.

It is an arithmetic number, because the mean of its divisors is an integer number (1770258240).

Almost surely, 2^20134204221 is an apocalyptic number.

It is an amenable number.

20134204221 is a deficient number, since it is larger than the sum of its proper divisors (8189927619).

20134204221 is a wasteful number, since it uses less digits than its factorization.

20134204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820016.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20134204221 its reverse (12240243102), we get a palindrome (32374447323).

The spelling of 20134204221 in words is "twenty billion, one hundred thirty-four million, two hundred four thousand, two hundred twenty-one".