20333011021 has 2 divisors, whose sum is σ = 20333011022. Its totient is φ = 20333011020.

The previous prime is 20333010979. The next prime is 20333011067. The reversal of 20333011021 is 12011033302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17302508521 + 3030502500 = 131539^2 + 55050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20333011021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20333010986 and 20333011004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20333011091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166505510 + 10166505511.

It is an arithmetic number, because the mean of its divisors is an integer number (10166505511).

Almost surely, 2^20333011021 is an apocalyptic number.

It is an amenable number.

20333011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20333011021 is an equidigital number, since it uses as much as digits as its factorization.

20333011021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20333011021 its reverse (12011033302), we get a palindrome (32344044323).

The spelling of 20333011021 in words is "twenty billion, three hundred thirty-three million, eleven thousand, twenty-one".