20000344312261 has 2 divisors, whose sum is σ = 20000344312262. Its totient is φ = 20000344312260.

The previous prime is 20000344312243. The next prime is 20000344312321. The reversal of 20000344312261 is 16221344300002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13686255856036 + 6314088456225 = 3699494^2 + 2512785^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000344312261 - 2¹¹ = 20000344310213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000344312211) 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, 10000172156130 + 10000172156131.

It is an arithmetic number, because the mean of its divisors is an integer number (10000172156131).

Almost surely, 2^{20000344312261} is an apocalyptic number.

It is an amenable number.

20000344312261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000344312261 is an equidigital number, since it uses as much as digits as its factorization.

20000344312261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20000344312261 its reverse (16221344300002), we get a palindrome (36221688612263).

The spelling of 20000344312261 in words is "twenty trillion, three hundred forty-four million, three hundred twelve thousand, two hundred sixty-one".