18791154018 has 192 divisors, whose sum is σ = 51316312320. Its totient is φ = 4838068224.

The previous prime is 18791154007. The next prime is 18791154023. The reversal of 18791154018 is 81045119781.

18791154018 is a `hidden beast` number, since 1 + 8 + 7 + 91 + 1 + 540 + 18 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12099130 + ... + 12100682.

It is an arithmetic number, because the mean of its divisors is an integer number (267272460).

Almost surely, 2^18791154018 is an apocalyptic number.

18791154018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18791154018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25658156160).

18791154018 is an abundant number, since it is smaller than the sum of its proper divisors (32525158302).

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

18791154018 is a wasteful number, since it uses less digits than its factorization.

18791154018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 45.

The spelling of 18791154018 in words is "eighteen billion, seven hundred ninety-one million, one hundred fifty-four thousand, eighteen".