18049481786 has 16 divisors (see below), whose sum is σ = 31065249600. Its totient is φ = 7704672000.

The previous prime is 18049481773. The next prime is 18049481831. The reversal of 18049481786 is 68718494081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2564711 + ... + 2571738.

It is an arithmetic number, because the mean of its divisors is an integer number (1941578100).

Almost surely, 2^18049481786 is an apocalyptic number.

18049481786 is a deficient number, since it is larger than the sum of its proper divisors (13015767814).

18049481786 is a wasteful number, since it uses less digits than its factorization.

18049481786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136709.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 18049481786 in words is "eighteen billion, forty-nine million, four hundred eighty-one thousand, seven hundred eighty-six".