20424233221 has 8 divisors (see below), whose sum is σ = 23346775040. Its totient is φ = 17502889968.

The previous prime is 20424233183. The next prime is 20424233227. The reversal of 20424233221 is 12233242402.

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 20424233221 - 2⁹ = 20424232709 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 (20424233227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262821 + ... + 331546.

It is an arithmetic number, because the mean of its divisors is an integer number (2918346880).

Almost surely, 2^20424233221 is an apocalyptic number.

It is an amenable number.

20424233221 is a deficient number, since it is larger than the sum of its proper divisors (2922541819).

20424233221 is an equidigital number, since it uses as much as digits as its factorization.

20424233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599283.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20424233221 its reverse (12233242402), we get a palindrome (32657475623).

The spelling of 20424233221 in words is "twenty billion, four hundred twenty-four million, two hundred thirty-three thousand, two hundred twenty-one".