18282773378 has 4 divisors (see below), whose sum is σ = 27424160070. Its totient is φ = 9141386688.

The previous prime is 18282773363. The next prime is 18282773419. The reversal of 18282773378 is 87337728281.

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

It can be written as a sum of positive squares in only one way, i.e., 9276193969 + 9006579409 = 96313^2 + 94903^2 .

It is a super-3 number, since 3×18282773378³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4570693343 + ... + 4570693346.

Almost surely, 2^18282773378 is an apocalyptic number.

18282773378 is a deficient number, since it is larger than the sum of its proper divisors (9141386692).

18282773378 is an equidigital number, since it uses as much as digits as its factorization.

18282773378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141386691.

The product of its digits is 6322176, while the sum is 56.

The spelling of 18282773378 in words is "eighteen billion, two hundred eighty-two million, seven hundred seventy-three thousand, three hundred seventy-eight".