20210134237 has 2 divisors, whose sum is σ = 20210134238. Its totient is φ = 20210134236.

The previous prime is 20210134181. The next prime is 20210134261. The reversal of 20210134237 is 73243101202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15141548601 + 5068585636 = 123051^2 + 71194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210134237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210134277) 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, 10105067118 + 10105067119.

It is an arithmetic number, because the mean of its divisors is an integer number (10105067119).

Almost surely, 2^20210134237 is an apocalyptic number.

It is an amenable number.

20210134237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210134237 is an equidigital number, since it uses as much as digits as its factorization.

20210134237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 20210134237 its reverse (73243101202), we get a palindrome (93453235439).

The spelling of 20210134237 in words is "twenty billion, two hundred ten million, one hundred thirty-four thousand, two hundred thirty-seven".