20441263081 has 4 divisors (see below), whose sum is σ = 20452248964. Its totient is φ = 20430277200.

The previous prime is 20441263067. The next prime is 20441263121. The reversal of 20441263081 is 18036214402.

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 1347550681 + 19093712400 = 36709^2 + 138180^2 .

It is a cyclic number.

It is not a de Polignac number, because 20441263081 - 2¹⁹ = 20440738793 is a prime.

It is a super-2 number, since 2×20441263081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20441263781) 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, 5490150 + ... + 5493871.

It is an arithmetic number, because the mean of its divisors is an integer number (5113062241).

Almost surely, 2^20441263081 is an apocalyptic number.

It is an amenable number.

20441263081 is a deficient number, since it is larger than the sum of its proper divisors (10985883).

20441263081 is a wasteful number, since it uses less digits than its factorization.

20441263081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10985882.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 20441263081 its reverse (18036214402), we get a palindrome (38477477483).

The spelling of 20441263081 in words is "twenty billion, four hundred forty-one million, two hundred sixty-three thousand, eighty-one".