20200440221 has 4 divisors (see below), whose sum is σ = 21754320252. Its totient is φ = 18646560192.

The previous prime is 20200440199. The next prime is 20200440223. The reversal of 20200440221 is 12204400202.

It is a happy number.

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 2381928025 + 17818512196 = 48805^2 + 133486^2 .

It is not a de Polignac number, because 20200440221 - 2⁶ = 20200440157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20200440221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200440223) 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, 776939996 + ... + 776940021.

It is an arithmetic number, because the mean of its divisors is an integer number (5438580063).

Almost surely, 2^20200440221 is an apocalyptic number.

It is an amenable number.

20200440221 is a deficient number, since it is larger than the sum of its proper divisors (1553880031).

20200440221 is a wasteful number, since it uses less digits than its factorization.

20200440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553880030.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20200440221 its reverse (12204400202), we get a palindrome (32404840423).

The spelling of 20200440221 in words is "twenty billion, two hundred million, four hundred forty thousand, two hundred twenty-one".