18701123445018 has 48 divisors (see below), whose sum is σ = 46307930011200. Its totient is φ = 5343133560768.

The previous prime is 18701123445001. The next prime is 18701123445029. The reversal of 18701123445018 is 81054432110781.

18701123445018 is a `hidden beast` number, since 1 + 8 + 70 + 1 + 123 + 4 + 450 + 1 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16396158 + ... + 17499606.

It is an arithmetic number, because the mean of its divisors is an integer number (964748541900).

Almost surely, 2^{18701123445018} is an apocalyptic number.

18701123445018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18701123445018 is an abundant number, since it is smaller than the sum of its proper divisors (27606806566182).

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

18701123445018 is a wasteful number, since it uses less digits than its factorization.

18701123445018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237971 (or 1237968 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

Adding to 18701123445018 its reverse (81054432110781), we get a palindrome (99755555555799).

The spelling of 18701123445018 in words is "eighteen trillion, seven hundred one billion, one hundred twenty-three million, four hundred forty-five thousand, eighteen".