18045048609947 has 2 divisors, whose sum is σ = 18045048609948. Its totient is φ = 18045048609946.

The previous prime is 18045048609851. The next prime is 18045048609979. The reversal of 18045048609947 is 74990684054081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18045048609947 is a prime.

It is not a weakly prime, because it can be changed into another prime (18045048609547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022524304973 + 9022524304974.

It is an arithmetic number, because the mean of its divisors is an integer number (9022524304974).

Almost surely, 2^{18045048609947} is an apocalyptic number.

18045048609947 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045048609947 is an equidigital number, since it uses as much as digits as its factorization.

18045048609947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 18045048609947 in words is "eighteen trillion, forty-five billion, forty-eight million, six hundred nine thousand, nine hundred forty-seven".