18197159299 has 8 divisors (see below), whose sum is σ = 19952217648. Its totient is φ = 16458896160.

The previous prime is 18197159269. The next prime is 18197159317. The reversal of 18197159299 is 99295179181.

It is a happy number.

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 18197159299 - 2⁹ = 18197158787 is a prime.

It is a super-2 number, since 2×18197159299² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18197159209) 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, 4196532 + ... + 4200865.

It is an arithmetic number, because the mean of its divisors is an integer number (2494027206).

Almost surely, 2^18197159299 is an apocalyptic number.

18197159299 is a deficient number, since it is larger than the sum of its proper divisors (1755058349).

18197159299 is a wasteful number, since it uses less digits than its factorization.

18197159299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8397605.

The product of its digits is 3674160, while the sum is 61.

The spelling of 18197159299 in words is "eighteen billion, one hundred ninety-seven million, one hundred fifty-nine thousand, two hundred ninety-nine".