18118200051 has 48 divisors (see below), whose sum is σ = 31031020800. Its totient is φ = 9967091904.

The previous prime is 18118200049. The next prime is 18118200059. The reversal of 18118200051 is 15000281181.

It is not a de Polignac number, because 18118200051 - 2¹ = 18118200049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18118199988 and 18118200024.

It is not an unprimeable number, because it can be changed into a prime (18118200059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 619680 + ... + 648258.

It is an arithmetic number, because the mean of its divisors is an integer number (646479600).

Almost surely, 2^18118200051 is an apocalyptic number.

18118200051 is a deficient number, since it is larger than the sum of its proper divisors (12912820749).

18118200051 is a wasteful number, since it uses less digits than its factorization.

18118200051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28968 (or 28965 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 27.

The spelling of 18118200051 in words is "eighteen billion, one hundred eighteen million, two hundred thousand, fifty-one".