20202040237 has 2 divisors, whose sum is σ = 20202040238. Its totient is φ = 20202040236.

The previous prime is 20202040153. The next prime is 20202040273. The reversal of 20202040237 is 73204020202.

Together with next prime (20202040273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18983052841 + 1218987396 = 137779^2 + 34914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202040237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202040277) 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, 10101020118 + 10101020119.

It is an arithmetic number, because the mean of its divisors is an integer number (10101020119).

Almost surely, 2^20202040237 is an apocalyptic number.

It is an amenable number.

20202040237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202040237 is an equidigital number, since it uses as much as digits as its factorization.

20202040237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 22.

Adding to 20202040237 its reverse (73204020202), we get a palindrome (93406060439).

The spelling of 20202040237 in words is "twenty billion, two hundred two million, forty thousand, two hundred thirty-seven".