20130224421 has 4 divisors (see below), whose sum is σ = 26840299232. Its totient is φ = 13420149612.

The previous prime is 20130224407. The next prime is 20130224423. The reversal of 20130224421 is 12442203102.

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 not a de Polignac number, because 20130224421 - 2²³ = 20121835813 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 (20130224423) 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, 3355037401 + ... + 3355037406.

It is an arithmetic number, because the mean of its divisors is an integer number (6710074808).

Almost surely, 2^20130224421 is an apocalyptic number.

It is an amenable number.

20130224421 is a deficient number, since it is larger than the sum of its proper divisors (6710074811).

20130224421 is an equidigital number, since it uses as much as digits as its factorization.

20130224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710074810.

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

Adding to 20130224421 its reverse (12442203102), we get a palindrome (32572427523).

The spelling of 20130224421 in words is "twenty billion, one hundred thirty million, two hundred twenty-four thousand, four hundred twenty-one".