20004311052109 has 2 divisors, whose sum is σ = 20004311052110. Its totient is φ = 20004311052108.

The previous prime is 20004311052071. The next prime is 20004311052137. The reversal of 20004311052109 is 90125011340002.

It is an a-pointer prime, because the next prime (20004311052137) can be obtained adding 20004311052109 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12217856114025 + 7786454938084 = 3495405^2 + 2790422^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004311052109 - 2¹⁷ = 20004310921037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004311022109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002155526054 + 10002155526055.

It is an arithmetic number, because the mean of its divisors is an integer number (10002155526055).

Almost surely, 2^{20004311052109} is an apocalyptic number.

It is an amenable number.

20004311052109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004311052109 is an equidigital number, since it uses as much as digits as its factorization.

20004311052109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 20004311052109 in words is "twenty trillion, four billion, three hundred eleven million, fifty-two thousand, one hundred nine".