20257770752677 has 2 divisors, whose sum is σ = 20257770752678. Its totient is φ = 20257770752676.

The previous prime is 20257770752633. The next prime is 20257770752731. The reversal of 20257770752677 is 77625707775202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10816955299396 + 9440815453281 = 3288914^2 + 3072591^2 .

It is a cyclic number.

It is not a de Polignac number, because 20257770752677 - 2¹⁵ = 20257770719909 is a prime.

It is a super-4 number, since 4×20257770752677⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20257770752477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10128885376338 + 10128885376339.

It is an arithmetic number, because the mean of its divisors is an integer number (10128885376339).

Almost surely, 2^{20257770752677} is an apocalyptic number.

It is an amenable number.

20257770752677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20257770752677 is an equidigital number, since it uses as much as digits as its factorization.

20257770752677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141178800, while the sum is 64.

The spelling of 20257770752677 in words is "twenty trillion, two hundred fifty-seven billion, seven hundred seventy million, seven hundred fifty-two thousand, six hundred seventy-seven".