20441444131 has 16 divisors (see below), whose sum is σ = 21180579840. Its totient is φ = 19712458080.

The previous prime is 20441444123. The next prime is 20441444161. The reversal of 20441444131 is 13144414402.

It is a cyclic number.

It is not a de Polignac number, because 20441444131 - 2³ = 20441444123 is a prime.

It is a super-2 number, since 2×20441444131² (a number of 21 digits) contains 22 as substring.

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 20441444131.

It is not an unprimeable number, because it can be changed into a prime (20441444161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7098750 + ... + 7101628.

It is an arithmetic number, because the mean of its divisors is an integer number (1323786240).

Almost surely, 2^20441444131 is an apocalyptic number.

20441444131 is a deficient number, since it is larger than the sum of its proper divisors (739135709).

20441444131 is a wasteful number, since it uses less digits than its factorization.

20441444131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20441444131 its reverse (13144414402), we get a palindrome (33585858533).

The spelling of 20441444131 in words is "twenty billion, four hundred forty-one million, four hundred forty-four thousand, one hundred thirty-one".