20000333081 has 2 divisors, whose sum is σ = 20000333082. Its totient is φ = 20000333080.

The previous prime is 20000333039. The next prime is 20000333113. The reversal of 20000333081 is 18033300002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19950150025 + 50183056 = 141245^2 + 7084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000333081 is a prime.

It is a super-2 number, since 2×20000333081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20000339081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000166540 + 10000166541.

It is an arithmetic number, because the mean of its divisors is an integer number (10000166541).

Almost surely, 2^20000333081 is an apocalyptic number.

It is an amenable number.

20000333081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000333081 is an equidigital number, since it uses as much as digits as its factorization.

20000333081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20000333081 its reverse (18033300002), we get a palindrome (38033633083).

The spelling of 20000333081 in words is "twenty billion, three hundred thirty-three thousand, eighty-one".