18378377044 has 24 divisors (see below), whose sum is σ = 32717966400. Its totient is φ = 9030488640.

The previous prime is 18378377011. The next prime is 18378377047. The reversal of 18378377044 is 44077387381.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18378376982 and 18378377000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18378377047) 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 7 ways as a sum of consecutive naturals, for example, 828984 + ... + 850864.

It is an arithmetic number, because the mean of its divisors is an integer number (1363248600).

Almost surely, 2^18378377044 is an apocalyptic number.

It is an amenable number.

18378377044 is a deficient number, since it is larger than the sum of its proper divisors (14339589356).

18378377044 is a wasteful number, since it uses less digits than its factorization.

18378377044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25503 (or 25501 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 18378377044 in words is "eighteen billion, three hundred seventy-eight million, three hundred seventy-seven thousand, forty-four".