20611320241 has 4 divisors (see below), whose sum is σ = 20761767972. Its totient is φ = 20460872512.

The previous prime is 20611320239. The next prime is 20611320271. The reversal of 20611320241 is 14202311602.

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 11681070241 + 8930250000 = 108079^2 + 94500^2 .

It is a cyclic number.

It is not a de Polignac number, because 20611320241 - 2¹ = 20611320239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20611320221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75223660 + ... + 75223933.

It is an arithmetic number, because the mean of its divisors is an integer number (5190441993).

Almost surely, 2^20611320241 is an apocalyptic number.

It is an amenable number.

20611320241 is a deficient number, since it is larger than the sum of its proper divisors (150447731).

20611320241 is a wasteful number, since it uses less digits than its factorization.

20611320241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150447730.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20611320241 its reverse (14202311602), we get a palindrome (34813631843).

The spelling of 20611320241 in words is "twenty billion, six hundred eleven million, three hundred twenty thousand, two hundred forty-one".