18169188940 has 48 divisors (see below), whose sum is σ = 46171121472. Its totient is φ = 5862998016.

The previous prime is 18169188937. The next prime is 18169188941. The reversal of 18169188940 is 4988196181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18169188941) 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 15 ways as a sum of consecutive naturals, for example, 3814677 + ... + 3819436.

It is an arithmetic number, because the mean of its divisors is an integer number (961898364).

Almost surely, 2^18169188940 is an apocalyptic number.

18169188940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18169188940 is an abundant number, since it is smaller than the sum of its proper divisors (28001932532).

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

18169188940 is a wasteful number, since it uses less digits than its factorization.

18169188940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634146 (or 7634144 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 55.

The spelling of 18169188940 in words is "eighteen billion, one hundred sixty-nine million, one hundred eighty-eight thousand, nine hundred forty".