1820283841 has 4 divisors (see below), whose sum is σ = 1828096452. Its totient is φ = 1812471232.

The previous prime is 1820283833. The next prime is 1820283911. The reversal of 1820283841 is 1483820281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1483820281 = 1759 ⋅843559.

It can be written as a sum of positive squares in 2 ways, for example, as 1209996225 + 610287616 = 34785^2 + 24704^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820283841 - 2³ = 1820283833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820283841.

It is not an unprimeable number, because it can be changed into a prime (1820283811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905956 + ... + 3906421.

It is an arithmetic number, because the mean of its divisors is an integer number (457024113).

Almost surely, 2^1820283841 is an apocalyptic number.

It is an amenable number.

1820283841 is a deficient number, since it is larger than the sum of its proper divisors (7812611).

1820283841 is an equidigital number, since it uses as much as digits as its factorization.

1820283841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7812610.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 1820283841 is about 42664.7845535402. The cubic root of 1820283841 is about 1220.9926170979.

The spelling of 1820283841 in words is "one billion, eight hundred twenty million, two hundred eighty-three thousand, eight hundred forty-one".