20225332321 has 4 divisors (see below), whose sum is σ = 20300519700. Its totient is φ = 20150144944.

The previous prime is 20225332319. The next prime is 20225332367. The reversal of 20225332321 is 12323352202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5228880721 + 14996451600 = 72311^2 + 122460^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225332321 - 2¹ = 20225332319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20225332301) 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, 37593286 + ... + 37593823.

It is an arithmetic number, because the mean of its divisors is an integer number (5075129925).

Almost surely, 2^20225332321 is an apocalyptic number.

It is an amenable number.

20225332321 is a deficient number, since it is larger than the sum of its proper divisors (75187379).

20225332321 is an equidigital number, since it uses as much as digits as its factorization.

20225332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75187378.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20225332321 its reverse (12323352202), we get a palindrome (32548684523).

The spelling of 20225332321 in words is "twenty billion, two hundred twenty-five million, three hundred thirty-two thousand, three hundred twenty-one".