20330120081 has 2 divisors, whose sum is σ = 20330120082. Its totient is φ = 20330120080.

The previous prime is 20330120059. The next prime is 20330120101. The reversal of 20330120081 is 18002103302.

It is an a-pointer prime, because the next prime (20330120101) can be obtained adding 20330120081 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20046029056 + 284091025 = 141584^2 + 16855^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330120081 - 2¹⁰ = 20330119057 is a prime.

It is a super-2 number, since 2×20330120081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20330122081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165060040 + 10165060041.

It is an arithmetic number, because the mean of its divisors is an integer number (10165060041).

Almost surely, 2^20330120081 is an apocalyptic number.

It is an amenable number.

20330120081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330120081 is an equidigital number, since it uses as much as digits as its factorization.

20330120081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20330120081 its reverse (18002103302), we get a palindrome (38332223383).

The spelling of 20330120081 in words is "twenty billion, three hundred thirty million, one hundred twenty thousand, eighty-one".