518118923 has 16 divisors (see below), whose sum is σ = 624000000. Its totient is φ = 420256512.

The previous prime is 518118883. The next prime is 518118949. The reversal of 518118923 is 329811815.

It is a cyclic number.

It is not a de Polignac number, because 518118923 - 2⁶ = 518118859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518118023) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 164558 + ... + 167676.

It is an arithmetic number, because the mean of its divisors is an integer number (39000000).

Almost surely, 2^518118923 is an apocalyptic number.

518118923 is a deficient number, since it is larger than the sum of its proper divisors (105881077).

518118923 is a wasteful number, since it uses less digits than its factorization.

518118923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394.

The product of its digits is 17280, while the sum is 38.

The square root of 518118923 is about 22762.2257918684. The cubic root of 518118923 is about 803.1743269637.

The spelling of 518118923 in words is "five hundred eighteen million, one hundred eighteen thousand, nine hundred twenty-three".