20202120020057 has 2 divisors, whose sum is σ = 20202120020058. Its totient is φ = 20202120020056.

The previous prime is 20202120019973. The next prime is 20202120020123. The reversal of 20202120020057 is 75002002120202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14321766616921 + 5880353403136 = 3784411^2 + 2424944^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202120020057 - 2¹⁸ = 20202119757913 is a prime.

It is not a weakly prime, because it can be changed into another prime (20202120020557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101060010028 + 10101060010029.

It is an arithmetic number, because the mean of its divisors is an integer number (10101060010029).

Almost surely, 2^{20202120020057} is an apocalyptic number.

It is an amenable number.

20202120020057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202120020057 is an equidigital number, since it uses as much as digits as its factorization.

20202120020057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

Adding to 20202120020057 its reverse (75002002120202), we get a palindrome (95204122140259).

The spelling of 20202120020057 in words is "twenty trillion, two hundred two billion, one hundred twenty million, twenty thousand, fifty-seven".