20012220937 has 2 divisors, whose sum is σ = 20012220938. Its totient is φ = 20012220936.

The previous prime is 20012220889. The next prime is 20012220947. The reversal of 20012220937 is 73902221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17088764176 + 2923456761 = 130724^2 + 54069^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012220937 - 2¹⁵ = 20012188169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012220947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006110468 + 10006110469.

It is an arithmetic number, because the mean of its divisors is an integer number (10006110469).

Almost surely, 2^20012220937 is an apocalyptic number.

It is an amenable number.

20012220937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012220937 is an equidigital number, since it uses as much as digits as its factorization.

20012220937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 20012220937 its reverse (73902221002), we get a palindrome (93914441939).

The spelling of 20012220937 in words is "twenty billion, twelve million, two hundred twenty thousand, nine hundred thirty-seven".