20001211576933 has 2 divisors, whose sum is σ = 20001211576934. Its totient is φ = 20001211576932.

The previous prime is 20001211576921. The next prime is 20001211576937. The reversal of 20001211576933 is 33967511210002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19657935110529 + 343276466404 = 4433727^2 + 585898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001211576933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001211576937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605788466 + 10000605788467.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605788467).

Almost surely, 2^{20001211576933} is an apocalyptic number.

It is an amenable number.

20001211576933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001211576933 is an equidigital number, since it uses as much as digits as its factorization.

20001211576933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

Adding to 20001211576933 its reverse (33967511210002), we get a palindrome (53968722786935).

The spelling of 20001211576933 in words is "twenty trillion, one billion, two hundred eleven million, five hundred seventy-six thousand, nine hundred thirty-three".