20305414221 has 4 divisors (see below), whose sum is σ = 27073885632. Its totient is φ = 13536942812.

The previous prime is 20305414211. The next prime is 20305414237. The reversal of 20305414221 is 12241450302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20305414221 - 2¹⁰ = 20305413197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20305414191 and 20305414200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305414201) 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, 3384235701 + ... + 3384235706.

It is an arithmetic number, because the mean of its divisors is an integer number (6768471408).

Almost surely, 2^20305414221 is an apocalyptic number.

It is an amenable number.

20305414221 is a deficient number, since it is larger than the sum of its proper divisors (6768471411).

20305414221 is an equidigital number, since it uses as much as digits as its factorization.

20305414221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768471410.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20305414221 its reverse (12241450302), we get a palindrome (32546864523).

The spelling of 20305414221 in words is "twenty billion, three hundred five million, four hundred fourteen thousand, two hundred twenty-one".