18277378803 has 12 divisors (see below), whose sum is σ = 27014627640. Its totient is φ = 11901548736.

The previous prime is 18277378799. The next prime is 18277378813. The reversal of 18277378803 is 30887377281.

It is a happy number.

It is not a de Polignac number, because 18277378803 - 2² = 18277378799 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18277378803.

It is not an unprimeable number, because it can be changed into a prime (18277378813) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 23613798 + ... + 23614571.

It is an arithmetic number, because the mean of its divisors is an integer number (2251218970).

Almost surely, 2^18277378803 is an apocalyptic number.

18277378803 is a deficient number, since it is larger than the sum of its proper divisors (8737248837).

18277378803 is a wasteful number, since it uses less digits than its factorization.

18277378803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47228418 (or 47228415 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 18277378803 in words is "eighteen billion, two hundred seventy-seven million, three hundred seventy-eight thousand, eight hundred three".