18784082860553 has 2 divisors, whose sum is σ = 18784082860554. Its totient is φ = 18784082860552.

The previous prime is 18784082860531. The next prime is 18784082860567. The reversal of 18784082860553 is 35506828048781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17402980769344 + 1381102091209 = 4171688^2 + 1175203^2 .

It is an emirp because it is prime and its reverse (35506828048781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18784082860553 - 2²⁴ = 18784066083337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18784082860553.

It is not a weakly prime, because it can be changed into another prime (18784082862553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9392041430276 + 9392041430277.

It is an arithmetic number, because the mean of its divisors is an integer number (9392041430277).

Almost surely, 2^{18784082860553} is an apocalyptic number.

It is an amenable number.

18784082860553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18784082860553 is an equidigital number, since it uses as much as digits as its factorization.

18784082860553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103219200, while the sum is 65.

The spelling of 18784082860553 in words is "eighteen trillion, seven hundred eighty-four billion, eighty-two million, eight hundred sixty thousand, five hundred fifty-three".