20201343641 has 2 divisors, whose sum is σ = 20201343642. Its totient is φ = 20201343640.

The previous prime is 20201343637. The next prime is 20201343649. The reversal of 20201343641 is 14634310202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19252950025 + 948393616 = 138755^2 + 30796^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201343641 - 2² = 20201343637 is a prime.

It is a super-2 number, since 2×20201343641² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20201343641.

It is not a weakly prime, because it can be changed into another prime (20201343649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100671820 + 10100671821.

It is an arithmetic number, because the mean of its divisors is an integer number (10100671821).

Almost surely, 2^20201343641 is an apocalyptic number.

It is an amenable number.

20201343641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201343641 is an equidigital number, since it uses as much as digits as its factorization.

20201343641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 20201343641 its reverse (14634310202), we get a palindrome (34835653843).

The spelling of 20201343641 in words is "twenty billion, two hundred one million, three hundred forty-three thousand, six hundred forty-one".