2042069581 has 4 divisors (see below), whose sum is σ = 2042161564. Its totient is φ = 2041977600.

The previous prime is 2042069537. The next prime is 2042069587. The reversal of 2042069581 is 1859602402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 465264900 + 1576804681 = 21570^2 + 39709^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042069581 - 2⁹ = 2042069069 is a prime.

It is a super-2 number, since 2×2042069581² = 8340096347291031122, which contains 22 as substring.

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 2042069581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042069587) 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 in 3 ways as a sum of consecutive naturals, for example, 10171 + ... + 64711.

It is an arithmetic number, because the mean of its divisors is an integer number (510540391).

Almost surely, 2^2042069581 is an apocalyptic number.

It is an amenable number.

2042069581 is a deficient number, since it is larger than the sum of its proper divisors (91983).

2042069581 is an equidigital number, since it uses as much as digits as its factorization.

2042069581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91982.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2042069581 is about 45189.2640015303. The cubic root of 2042069581 is about 1268.6938813264.

The spelling of 2042069581 in words is "two billion, forty-two million, sixty-nine thousand, five hundred eighty-one".