20312333009 has 2 divisors, whose sum is σ = 20312333010. Its totient is φ = 20312333008.

The previous prime is 20312333003. The next prime is 20312333039. The reversal of 20312333009 is 90033321302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20207475409 + 104857600 = 142153^2 + 10240^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312333009 - 2⁴ = 20312332993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20312333003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156166504 + 10156166505.

It is an arithmetic number, because the mean of its divisors is an integer number (10156166505).

Almost surely, 2^20312333009 is an apocalyptic number.

It is an amenable number.

20312333009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312333009 is an equidigital number, since it uses as much as digits as its factorization.

20312333009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

The spelling of 20312333009 in words is "twenty billion, three hundred twelve million, three hundred thirty-three thousand, nine".