20085379757 has 2 divisors, whose sum is σ = 20085379758. Its totient is φ = 20085379756.

The previous prime is 20085379711. The next prime is 20085379771. The reversal of 20085379757 is 75797358002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18987186436 + 1098193321 = 137794^2 + 33139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20085379757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20085379699 and 20085379708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20085379157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042689878 + 10042689879.

It is an arithmetic number, because the mean of its divisors is an integer number (10042689879).

Almost surely, 2^20085379757 is an apocalyptic number.

It is an amenable number.

20085379757 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085379757 is an equidigital number, since it uses as much as digits as its factorization.

20085379757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 20085379757 in words is "twenty billion, eighty-five million, three hundred seventy-nine thousand, seven hundred fifty-seven".