20220000491 has 2 divisors, whose sum is σ = 20220000492. Its totient is φ = 20220000490.

The previous prime is 20220000473. The next prime is 20220000517. The reversal of 20220000491 is 19400002202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20220000491 - 2¹⁰ = 20219999467 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220030491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110000245 + 10110000246.

It is an arithmetic number, because the mean of its divisors is an integer number (10110000246).

Almost surely, 2^20220000491 is an apocalyptic number.

20220000491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220000491 is an equidigital number, since it uses as much as digits as its factorization.

20220000491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20220000491 its reverse (19400002202), we get a palindrome (39620002693).

The spelling of 20220000491 in words is "twenty billion, two hundred twenty million, four hundred ninety-one", and thus it is an aban number.