4020345457 has 2 divisors, whose sum is σ = 4020345458. Its totient is φ = 4020345456.

The previous prime is 4020345403. The next prime is 4020345463. The reversal of 4020345457 is 7545430204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3962828401 + 57517056 = 62951^2 + 7584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020345457 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020345257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010172728 + 2010172729.

It is an arithmetic number, because the mean of its divisors is an integer number (2010172729).

Almost surely, 2^4020345457 is an apocalyptic number.

It is an amenable number.

4020345457 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020345457 is an equidigital number, since it uses as much as digits as its factorization.

4020345457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 34.

The square root of 4020345457 is about 63406.1941532529. The cubic root of 4020345457 is about 1590.0878683822.

The spelling of 4020345457 in words is "four billion, twenty million, three hundred forty-five thousand, four hundred fifty-seven".