18778282071 has 4 divisors (see below), whose sum is σ = 25037709432. Its totient is φ = 12518854712.

The previous prime is 18778282063. The next prime is 18778282109. The reversal of 18778282071 is 17028287781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18778282071 - 2³ = 18778282063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18778282871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3129713676 + ... + 3129713681.

It is an arithmetic number, because the mean of its divisors is an integer number (6259427358).

Almost surely, 2^18778282071 is an apocalyptic number.

18778282071 is a deficient number, since it is larger than the sum of its proper divisors (6259427361).

18778282071 is an equidigital number, since it uses as much as digits as its factorization.

18778282071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6259427360.

The product of its (nonzero) digits is 702464, while the sum is 51.

The spelling of 18778282071 in words is "eighteen billion, seven hundred seventy-eight million, two hundred eighty-two thousand, seventy-one".