18909127872 has 42 divisors (see below), whose sum is σ = 54199602548. Its totient is φ = 6303042432.

The previous prime is 18909127859. The next prime is 18909127889. The reversal of 18909127872 is 27872190981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16413598 + ... + 16414749.

Almost surely, 2^18909127872 is an apocalyptic number.

18909127872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18909127872 is an abundant number, since it is smaller than the sum of its proper divisors (35290474676).

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

18909127872 is a wasteful number, since it uses less digits than its factorization.

18909127872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32828365 (or 32828352 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 18909127872 in words is "eighteen billion, nine hundred nine million, one hundred twenty-seven thousand, eight hundred seventy-two".