18198997339 has 8 divisors (see below), whose sum is σ = 18308067120. Its totient is φ = 18090080256.

The previous prime is 18198997247. The next prime is 18198997343. The reversal of 18198997339 is 93379989181.

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 18198997339 - 2⁷ = 18198997211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18198917339) 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, 205539 + ... + 280435.

It is an arithmetic number, because the mean of its divisors is an integer number (2288508390).

Almost surely, 2^18198997339 is an apocalyptic number.

18198997339 is a deficient number, since it is larger than the sum of its proper divisors (109069781).

18198997339 is a wasteful number, since it uses less digits than its factorization.

18198997339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76349.

The product of its digits is 26453952, while the sum is 67.

The spelling of 18198997339 in words is "eighteen billion, one hundred ninety-eight million, nine hundred ninety-seven thousand, three hundred thirty-nine".