20684078141 has 2 divisors, whose sum is σ = 20684078142. Its totient is φ = 20684078140.

The previous prime is 20684078123. The next prime is 20684078147. The reversal of 20684078141 is 14187048602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20326490041 + 357588100 = 142571^2 + 18910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20684078141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20684078147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10342039070 + 10342039071.

It is an arithmetic number, because the mean of its divisors is an integer number (10342039071).

Almost surely, 2^20684078141 is an apocalyptic number.

It is an amenable number.

20684078141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20684078141 is an equidigital number, since it uses as much as digits as its factorization.

20684078141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 41.

The spelling of 20684078141 in words is "twenty billion, six hundred eighty-four million, seventy-eight thousand, one hundred forty-one".