20033081 has 2 divisors, whose sum is σ = 20033082. Its totient is φ = 20033080.

The previous prime is 20033077. The next prime is 20033093. The reversal of 20033081 is 18033002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 3671056 = 4045^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033081 - 2² = 20033077 is a prime.

It is a super-2 number, since 2×20033081² = 802648668705122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20033381) 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, 10016540 + 10016541.

It is an arithmetic number, because the mean of its divisors is an integer number (10016541).

Almost surely, 2^20033081 is an apocalyptic number.

It is an amenable number.

20033081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20033081 is an equidigital number, since it uses as much as digits as its factorization.

20033081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20033081 is about 4475.8329950971. The cubic root of 20033081 is about 271.5913386358.

Adding to 20033081 its reverse (18033002), we get a palindrome (38066083).

The spelling of 20033081 in words is "twenty million, thirty-three thousand, eighty-one".