20708088077 has 2 divisors, whose sum is σ = 20708088078. Its totient is φ = 20708088076.

The previous prime is 20708088013. The next prime is 20708088101. The reversal of 20708088077 is 77088080702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15955226596 + 4752861481 = 126314^2 + 68941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20708088077 - 2⁶ = 20708088013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20708085077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10354044038 + 10354044039.

It is an arithmetic number, because the mean of its divisors is an integer number (10354044039).

Almost surely, 2^20708088077 is an apocalyptic number.

It is an amenable number.

20708088077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20708088077 is an equidigital number, since it uses as much as digits as its factorization.

20708088077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 351232, while the sum is 47.

The spelling of 20708088077 in words is "twenty billion, seven hundred eight million, eighty-eight thousand, seventy-seven".