2020221977 has 2 divisors, whose sum is σ = 2020221978. Its totient is φ = 2020221976.

The previous prime is 2020221971. The next prime is 2020222003. The reversal of 2020221977 is 7791220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2007398416 + 12823561 = 44804^2 + 3581^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020221977 - 2⁴ = 2020221961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020221971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010110988 + 1010110989.

It is an arithmetic number, because the mean of its divisors is an integer number (1010110989).

Almost surely, 2^2020221977 is an apocalyptic number.

It is an amenable number.

2020221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020221977 is an equidigital number, since it uses as much as digits as its factorization.

2020221977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 2020221977 is about 44946.8795023637. The cubic root of 2020221977 is about 1264.1531672348.

The spelling of 2020221977 in words is "two billion, twenty million, two hundred twenty-one thousand, nine hundred seventy-seven".