20839873233077 has 2 divisors, whose sum is σ = 20839873233078. Its totient is φ = 20839873233076.

The previous prime is 20839873233043. The next prime is 20839873233079. The reversal of 20839873233077 is 77033237893802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19219754113156 + 1620119119921 = 4384034^2 + 1272839^2 .

It is a cyclic number.

It is not a de Polignac number, because 20839873233077 - 2⁶ = 20839873233013 is a prime.

Together with 20839873233079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20839873233079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10419936616538 + 10419936616539.

It is an arithmetic number, because the mean of its divisors is an integer number (10419936616539).

Almost surely, 2^{20839873233077} is an apocalyptic number.

It is an amenable number.

20839873233077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20839873233077 is an equidigital number, since it uses as much as digits as its factorization.

20839873233077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64012032, while the sum is 62.

The spelling of 20839873233077 in words is "twenty trillion, eight hundred thirty-nine billion, eight hundred seventy-three million, two hundred thirty-three thousand, seventy-seven".