18917074243 has 8 divisors (see below), whose sum is σ = 19255762800. Its totient is φ = 18578987808.

The previous prime is 18917074229. The next prime is 18917074271. The reversal of 18917074243 is 34247071981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18917074243 - 2²¹ = 18914977091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18917074193 and 18917074202.

It is not an unprimeable number, because it can be changed into a prime (18917074213) 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 7 ways as a sum of consecutive naturals, for example, 86896 + ... + 213037.

It is an arithmetic number, because the mean of its divisors is an integer number (2406970350).

Almost surely, 2^18917074243 is an apocalyptic number.

18917074243 is a deficient number, since it is larger than the sum of its proper divisors (338688557).

18917074243 is a wasteful number, since it uses less digits than its factorization.

18917074243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301061.

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

The spelling of 18917074243 in words is "eighteen billion, nine hundred seventeen million, seventy-four thousand, two hundred forty-three".