2020081 has 4 divisors (see below), whose sum is σ = 2308672. Its totient is φ = 1731492.

The previous prime is 2020079. The next prime is 2020091. The reversal of 2020081 is 1800202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2020081 - 2¹ = 2020079 is a prime.

It is a super-2 number, since 2×2020081² = 8161454493122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144285 + ... + 144298.

It is an arithmetic number, because the mean of its divisors is an integer number (577168).

2^2020081 is an apocalyptic number.

It is an amenable number.

2020081 is a deficient number, since it is larger than the sum of its proper divisors (288591).

2020081 is an equidigital number, since it uses as much as digits as its factorization.

2020081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288590.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2020081 is about 1421.2955357701. The cubic root of 2020081 is about 126.4123761115.

Adding to 2020081 its reverse (1800202), we get a palindrome (3820283).

The spelling of 2020081 in words is "two million, twenty thousand, eighty-one".