20118455296057 has 2 divisors, whose sum is σ = 20118455296058. Its totient is φ = 20118455296056.

The previous prime is 20118455296039. The next prime is 20118455296063. The reversal of 20118455296057 is 75069255481102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18863481790521 + 1254973505536 = 4343211^2 + 1120256^2 .

It is a cyclic number.

It is not a de Polignac number, because 20118455296057 - 2⁷ = 20118455295929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20118455295989 and 20118455296007.

It is not a weakly prime, because it can be changed into another prime (20118455296007) 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, 10059227648028 + 10059227648029.

It is an arithmetic number, because the mean of its divisors is an integer number (10059227648029).

Almost surely, 2^{20118455296057} is an apocalyptic number.

It is an amenable number.

20118455296057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20118455296057 is an equidigital number, since it uses as much as digits as its factorization.

20118455296057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 20118455296057 in words is "twenty trillion, one hundred eighteen billion, four hundred fifty-five million, two hundred ninety-six thousand, fifty-seven".