20330441081 has 2 divisors, whose sum is σ = 20330441082. Its totient is φ = 20330441080.

The previous prime is 20330441077. The next prime is 20330441101. The reversal of 20330441081 is 18014403302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19288765456 + 1041675625 = 138884^2 + 32275^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330441081 - 2² = 20330441077 is a prime.

It is a super-2 number, since 2×20330441081² (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 20330441081.

It is not a weakly prime, because it can be changed into another prime (20330441071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165220540 + 10165220541.

It is an arithmetic number, because the mean of its divisors is an integer number (10165220541).

Almost surely, 2^20330441081 is an apocalyptic number.

It is an amenable number.

20330441081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330441081 is an equidigital number, since it uses as much as digits as its factorization.

20330441081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 20330441081 its reverse (18014403302), we get a palindrome (38344844383).

The spelling of 20330441081 in words is "twenty billion, three hundred thirty million, four hundred forty-one thousand, eighty-one".