18198064239 has 8 divisors (see below), whose sum is σ = 25691384880. Its totient is φ = 11418393216.

The previous prime is 18198064229. The next prime is 18198064243. The reversal of 18198064239 is 93246089181.

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

It is not a de Polignac number, because 18198064239 - 2¹⁵ = 18198031471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 356824789 = 18198064239 / (1 + 8 + 1 + 9 + 8 + 0 + 6 + 4 + 2 + 3 + 9).

It is a junction number, because it is equal to n+sod(n) for n = 18198064191 and 18198064200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198064219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178412344 + ... + 178412445.

It is an arithmetic number, because the mean of its divisors is an integer number (3211423110).

Almost surely, 2^18198064239 is an apocalyptic number.

18198064239 is a deficient number, since it is larger than the sum of its proper divisors (7493320641).

18198064239 is a wasteful number, since it uses less digits than its factorization.

18198064239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356824809.

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 18198064239 in words is "eighteen billion, one hundred ninety-eight million, sixty-four thousand, two hundred thirty-nine".