18017472943 has 4 divisors (see below), whose sum is σ = 18071906728. Its totient is φ = 17963039160.

The previous prime is 18017472911. The next prime is 18017473031. The reversal of 18017472943 is 34927471081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34927471081 = 8929 ⋅3911689.

It is a cyclic number.

It is not a de Polignac number, because 18017472943 - 2⁵ = 18017472911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18017472893 and 18017472902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18017472643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27216396 + ... + 27217057.

It is an arithmetic number, because the mean of its divisors is an integer number (4517976682).

Almost surely, 2^18017472943 is an apocalyptic number.

18017472943 is a deficient number, since it is larger than the sum of its proper divisors (54433785).

18017472943 is an equidigital number, since it uses as much as digits as its factorization.

18017472943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54433784.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 18017472943 in words is "eighteen billion, seventeen million, four hundred seventy-two thousand, nine hundred forty-three".