18378789128303 has 2 divisors, whose sum is σ = 18378789128304. Its totient is φ = 18378789128302.

The previous prime is 18378789128281. The next prime is 18378789128327. The reversal of 18378789128303 is 30382198787381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18378789128303 - 2²⁶ = 18378722019439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18378789128363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189394564151 + 9189394564152.

It is an arithmetic number, because the mean of its divisors is an integer number (9189394564152).

Almost surely, 2^{18378789128303} is an apocalyptic number.

18378789128303 is a deficient number, since it is larger than the sum of its proper divisors (1).

18378789128303 is an equidigital number, since it uses as much as digits as its factorization.

18378789128303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97542144, while the sum is 68.

The spelling of 18378789128303 in words is "eighteen trillion, three hundred seventy-eight billion, seven hundred eighty-nine million, one hundred twenty-eight thousand, three hundred three".