20225023221 has 32 divisors (see below), whose sum is σ = 29676971520. Its totient is φ = 12173958144.

The previous prime is 20225023171. The next prime is 20225023223. The reversal of 20225023221 is 12232052202.

It is not a de Polignac number, because 20225023221 - 2²⁵ = 20191468789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225023223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5330301 + ... + 5334093.

It is an arithmetic number, because the mean of its divisors is an integer number (927405360).

Almost surely, 2^20225023221 is an apocalyptic number.

It is an amenable number.

20225023221 is a deficient number, since it is larger than the sum of its proper divisors (9451948299).

20225023221 is a wasteful number, since it uses less digits than its factorization.

20225023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6765.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 20225023221 its reverse (12232052202), we get a palindrome (32457075423).

The spelling of 20225023221 in words is "twenty billion, two hundred twenty-five million, twenty-three thousand, two hundred twenty-one".