20112331009 has 2 divisors, whose sum is σ = 20112331010. Its totient is φ = 20112331008.

The previous prime is 20112330991. The next prime is 20112331021. The reversal of 20112331009 is 90013321102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18156215025 + 1956115984 = 134745^2 + 44228^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112331009 - 2¹¹ = 20112328961 is a prime.

It is a super-3 number, since 3×20112331009³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20112331069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056165504 + 10056165505.

It is an arithmetic number, because the mean of its divisors is an integer number (10056165505).

Almost surely, 2^20112331009 is an apocalyptic number.

It is an amenable number.

20112331009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112331009 is an equidigital number, since it uses as much as digits as its factorization.

20112331009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 20112331009 in words is "twenty billion, one hundred twelve million, three hundred thirty-one thousand, nine".