20204422144 has 88 divisors (see below), whose sum is σ = 41551234200. Its totient is φ = 9813688320.

The previous prime is 20204422129. The next prime is 20204422163. The reversal of 20204422144 is 44122440202.

It can be written as a sum of positive squares in 4 ways, for example, as 298598400 + 19905823744 = 17280^2 + 141088^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11292802 + ... + 11294590.

Almost surely, 2^20204422144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20204422144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20775617100).

20204422144 is an abundant number, since it is smaller than the sum of its proper divisors (21346812056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20204422144 is a wasteful number, since it uses less digits than its factorization.

20204422144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119 (or 2101 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 20204422144 its reverse (44122440202), we get a palindrome (64326862346).

The spelling of 20204422144 in words is "twenty billion, two hundred four million, four hundred twenty-two thousand, one hundred forty-four".