20726377057 has 2 divisors, whose sum is σ = 20726377058. Its totient is φ = 20726377056.

The previous prime is 20726377051. The next prime is 20726377073. The reversal of 20726377057 is 75077362702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17684744256 + 3041632801 = 132984^2 + 55151^2 .

It is a cyclic number.

It is not a de Polignac number, because 20726377057 - 2¹¹ = 20726375009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20726376998 and 20726377016.

It is not a weakly prime, because it can be changed into another prime (20726377051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10363188528 + 10363188529.

It is an arithmetic number, because the mean of its divisors is an integer number (10363188529).

Almost surely, 2^20726377057 is an apocalyptic number.

It is an amenable number.

20726377057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20726377057 is an equidigital number, since it uses as much as digits as its factorization.

20726377057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864360, while the sum is 46.

The spelling of 20726377057 in words is "twenty billion, seven hundred twenty-six million, three hundred seventy-seven thousand, fifty-seven".