20012220947 has 2 divisors, whose sum is σ = 20012220948. Its totient is φ = 20012220946.

The previous prime is 20012220937. The next prime is 20012220983. The reversal of 20012220947 is 74902221002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012220947 - 2¹⁰ = 20012219923 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012220937) 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, 10006110473 + 10006110474.

It is an arithmetic number, because the mean of its divisors is an integer number (10006110474).

Almost surely, 2^20012220947 is an apocalyptic number.

20012220947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012220947 is an equidigital number, since it uses as much as digits as its factorization.

20012220947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 20012220947 its reverse (74902221002), we get a palindrome (94914441949).

The spelling of 20012220947 in words is "twenty billion, twelve million, two hundred twenty thousand, nine hundred forty-seven".