20012012099689 has 2 divisors, whose sum is σ = 20012012099690. Its totient is φ = 20012012099688.

The previous prime is 20012012099687. The next prime is 20012012099711. The reversal of 20012012099689 is 98699021021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16460125323664 + 3551886776025 = 4057108^2 + 1884645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012012099689 - 2¹ = 20012012099687 is a prime.

Together with 20012012099687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20012012099687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006006049844 + 10006006049845.

It is an arithmetic number, because the mean of its divisors is an integer number (10006006049845).

Almost surely, 2^{20012012099689} is an apocalyptic number.

It is an amenable number.

20012012099689 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012012099689 is an equidigital number, since it uses as much as digits as its factorization.

20012012099689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 20012012099689 in words is "twenty trillion, twelve billion, twelve million, ninety-nine thousand, six hundred eighty-nine".