18045807378 has 32 divisors (see below), whose sum is σ = 37145606400. Its totient is φ = 5842061136.

The previous prime is 18045807341. The next prime is 18045807379. The reversal of 18045807378 is 87370854081.

It is a self number, because there is not a number n which added to its sum of digits gives 18045807378.

It is not an unprimeable number, because it can be changed into a prime (18045807379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277708 + ... + 336471.

It is an arithmetic number, because the mean of its divisors is an integer number (1160800200).

Almost surely, 2^18045807378 is an apocalyptic number.

18045807378 is an abundant number, since it is smaller than the sum of its proper divisors (19099799022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18045807378 is a wasteful number, since it uses less digits than its factorization.

18045807378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614326.

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 18045807378 in words is "eighteen billion, forty-five million, eight hundred seven thousand, three hundred seventy-eight".