2020001820181 has 2 divisors, whose sum is σ = 2020001820182. Its totient is φ = 2020001820180.

The previous prime is 2020001820169. The next prime is 2020001820227. The reversal of 2020001820181 is 1810281000202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1220781912100 + 799219908081 = 1104890^2 + 893991^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020001820181 - 2¹⁵ = 2020001787413 is a prime.

It is a super-2 number, since 2×2020001820181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020001820101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010000910090 + 1010000910091.

It is an arithmetic number, because the mean of its divisors is an integer number (1010000910091).

Almost surely, 2^{2020001820181} is an apocalyptic number.

It is an amenable number.

2020001820181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020001820181 is an equidigital number, since it uses as much as digits as its factorization.

2020001820181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 2020001820181 its reverse (1810281000202), we get a palindrome (3830282820383).

The spelling of 2020001820181 in words is "two trillion, twenty billion, one million, eight hundred twenty thousand, one hundred eighty-one".