20043410221 has 4 divisors (see below), whose sum is σ = 20044173244. Its totient is φ = 20042647200.

The previous prime is 20043410209. The next prime is 20043410243. The reversal of 20043410221 is 12201434002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12201434002 = 2 ⋅6100717001.

It can be written as a sum of positive squares in 2 ways, for example, as 10709145225 + 9334264996 = 103485^2 + 96614^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043410221 - 2¹¹ = 20043408173 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 (20043410201) 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, 340650 + ... + 395131.

It is an arithmetic number, because the mean of its divisors is an integer number (5011043311).

Almost surely, 2^20043410221 is an apocalyptic number.

It is an amenable number.

20043410221 is a deficient number, since it is larger than the sum of its proper divisors (763023).

20043410221 is an equidigital number, since it uses as much as digits as its factorization.

20043410221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763022.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20043410221 its reverse (12201434002), we get a palindrome (32244844223).

The spelling of 20043410221 in words is "twenty billion, forty-three million, four hundred ten thousand, two hundred twenty-one".