20210134181 has 2 divisors, whose sum is σ = 20210134182. Its totient is φ = 20210134180.

The previous prime is 20210134129. The next prime is 20210134237. The reversal of 20210134181 is 18143101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18260116900 + 1950017281 = 135130^2 + 44159^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210134181 - 2¹⁸ = 20209872037 is a prime.

It is a super-2 number, since 2×20210134181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210134081) 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, 10105067090 + 10105067091.

It is an arithmetic number, because the mean of its divisors is an integer number (10105067091).

Almost surely, 2^20210134181 is an apocalyptic number.

It is an amenable number.

20210134181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210134181 is an equidigital number, since it uses as much as digits as its factorization.

20210134181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 20210134181 its reverse (18143101202), we get a palindrome (38353235383).

The spelling of 20210134181 in words is "twenty billion, two hundred ten million, one hundred thirty-four thousand, one hundred eighty-one".