20202212477 has 2 divisors, whose sum is σ = 20202212478. Its totient is φ = 20202212476.

The previous prime is 20202212461. The next prime is 20202212489. The reversal of 20202212477 is 77421220202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14686773721 + 5515438756 = 121189^2 + 74266^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202212477 - 2⁴ = 20202212461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202212447) 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, 10101106238 + 10101106239.

It is an arithmetic number, because the mean of its divisors is an integer number (10101106239).

Almost surely, 2^20202212477 is an apocalyptic number.

It is an amenable number.

20202212477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202212477 is an equidigital number, since it uses as much as digits as its factorization.

20202212477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 29.

Adding to 20202212477 its reverse (77421220202), we get a palindrome (97623432679).

The spelling of 20202212477 in words is "twenty billion, two hundred two million, two hundred twelve thousand, four hundred seventy-seven".