18009337378 has 16 divisors (see below), whose sum is σ = 28440659520. Its totient is φ = 8529279696.

The previous prime is 18009337373. The next prime is 18009337393. The reversal of 18009337378 is 87373390081.

It is not an unprimeable number, because it can be changed into a prime (18009337373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203676 + ... + 278392.

It is an arithmetic number, because the mean of its divisors is an integer number (1777541220).

Almost surely, 2^18009337378 is an apocalyptic number.

18009337378 is a deficient number, since it is larger than the sum of its proper divisors (10431322142).

18009337378 is a wasteful number, since it uses less digits than its factorization.

18009337378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81081.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 18009337378 in words is "eighteen billion, nine million, three hundred thirty-seven thousand, three hundred seventy-eight".