20011011202057 has 2 divisors, whose sum is σ = 20011011202058. Its totient is φ = 20011011202056.

The previous prime is 20011011202027. The next prime is 20011011202103. The reversal of 20011011202057 is 75020211011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13890909156601 + 6120102045456 = 3727051^2 + 2473884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011011202057 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011011202027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005505601028 + 10005505601029.

It is an arithmetic number, because the mean of its divisors is an integer number (10005505601029).

Almost surely, 2^{20011011202057} is an apocalyptic number.

It is an amenable number.

20011011202057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011011202057 is an equidigital number, since it uses as much as digits as its factorization.

20011011202057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 20011011202057 its reverse (75020211011002), we get a palindrome (95031222213059).

The spelling of 20011011202057 in words is "twenty trillion, eleven billion, eleven million, two hundred two thousand, fifty-seven".