2820394081 has 2 divisors, whose sum is σ = 2820394082. Its totient is φ = 2820394080.

The previous prime is 2820394063. The next prime is 2820394117. The reversal of 2820394081 is 1804930282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2756250000 + 64144081 = 52500^2 + 8009^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820394081 - 2¹³ = 2820385889 is a prime.

It is a super-2 number, since 2×2820394081² = 15909245544279669122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2820394081.

It is not a weakly prime, because it can be changed into another prime (2820394981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410197040 + 1410197041.

It is an arithmetic number, because the mean of its divisors is an integer number (1410197041).

Almost surely, 2^2820394081 is an apocalyptic number.

It is an amenable number.

2820394081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820394081 is an equidigital number, since it uses as much as digits as its factorization.

2820394081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2820394081 is about 53107.3825470621. The cubic root of 2820394081 is about 1412.8734522602.

The spelling of 2820394081 in words is "two billion, eight hundred twenty million, three hundred ninety-four thousand, eighty-one".