2017819454947 has 2 divisors, whose sum is σ = 2017819454948. Its totient is φ = 2017819454946.

The previous prime is 2017819454899. The next prime is 2017819454951. The reversal of 2017819454947 is 7494549187102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2017819454947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2017819454747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008909727473 + 1008909727474.

It is an arithmetic number, because the mean of its divisors is an integer number (1008909727474).

Almost surely, 2^{2017819454947} is an apocalyptic number.

2017819454947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2017819454947 is an equidigital number, since it uses as much as digits as its factorization.

2017819454947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 2017819454947 in words is "two trillion, seventeen billion, eight hundred nineteen million, four hundred fifty-four thousand, nine hundred forty-seven".