2081819357 has 2 divisors, whose sum is σ = 2081819358. Its totient is φ = 2081819356.

The previous prime is 2081819287. The next prime is 2081819359. The reversal of 2081819357 is 7539181802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1537110436 + 544708921 = 39206^2 + 23339^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081819357 - 2¹⁴ = 2081802973 is a prime.

Together with 2081819359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081819359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040909678 + 1040909679.

It is an arithmetic number, because the mean of its divisors is an integer number (1040909679).

Almost surely, 2^2081819357 is an apocalyptic number.

It is an amenable number.

2081819357 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081819357 is an equidigital number, since it uses as much as digits as its factorization.

2081819357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 2081819357 is about 45626.9586648069. The cubic root of 2081819357 is about 1276.8729325241.

The spelling of 2081819357 in words is "two billion, eighty-one million, eight hundred nineteen thousand, three hundred fifty-seven".