18518350188 has 24 divisors (see below), whose sum is σ = 46533290608. Its totient is φ = 5697953856.

The previous prime is 18518350181. The next prime is 18518350241. The reversal of 18518350188 is 88105381581.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18518350181) 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, 59353531 + ... + 59353842.

Almost surely, 2^18518350188 is an apocalyptic number.

It is an amenable number.

18518350188 is an abundant number, since it is smaller than the sum of its proper divisors (28014940420).

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

18518350188 is a wasteful number, since it uses less digits than its factorization.

18518350188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118707393 (or 118707391 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 48.

The spelling of 18518350188 in words is "eighteen billion, five hundred eighteen million, three hundred fifty thousand, one hundred eighty-eight".