2042820457 has 2 divisors, whose sum is σ = 2042820458. Its totient is φ = 2042820456.

The previous prime is 2042820421. The next prime is 2042820491. The reversal of 2042820457 is 7540282402.

It is an a-pointer prime, because the next prime (2042820491) can be obtained adding 2042820457 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1440657936 + 602162521 = 37956^2 + 24539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2042820457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2042820257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021410228 + 1021410229.

It is an arithmetic number, because the mean of its divisors is an integer number (1021410229).

Almost surely, 2^2042820457 is an apocalyptic number.

It is an amenable number.

2042820457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042820457 is an equidigital number, since it uses as much as digits as its factorization.

2042820457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 2042820457 is about 45197.5713617446. The cubic root of 2042820457 is about 1268.8493633037.

The spelling of 2042820457 in words is "two billion, forty-two million, eight hundred twenty thousand, four hundred fifty-seven".