20444431411 has 4 divisors (see below), whose sum is σ = 20463884824. Its totient is φ = 20424978000.

The previous prime is 20444431367. The next prime is 20444431451. The reversal of 20444431411 is 11413444402.

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

It is a cyclic number.

It is not a de Polignac number, because 20444431411 - 2⁹ = 20444430899 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 20444431411.

It is not an unprimeable number, because it can be changed into a prime (20444431451) 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, 9725130 + ... + 9727231.

It is an arithmetic number, because the mean of its divisors is an integer number (5115971206).

Almost surely, 2^20444431411 is an apocalyptic number.

20444431411 is a deficient number, since it is larger than the sum of its proper divisors (19453413).

20444431411 is a wasteful number, since it uses less digits than its factorization.

20444431411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19453412.

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

Adding to 20444431411 its reverse (11413444402), we get a palindrome (31857875813).

The spelling of 20444431411 in words is "twenty billion, four hundred forty-four million, four hundred thirty-one thousand, four hundred eleven".