18336879169 has 4 divisors (see below), whose sum is σ = 20956433344. Its totient is φ = 15717324996.

The previous prime is 18336879151. The next prime is 18336879181. The reversal of 18336879169 is 96197863381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96197863381 = 26861 ⋅3581321.

It is a cyclic number.

It is not a de Polignac number, because 18336879169 - 2⁵ = 18336879137 is a prime.

It is a super-2 number, since 2×18336879169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18336879139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309777077 + ... + 1309777090.

It is an arithmetic number, because the mean of its divisors is an integer number (5239108336).

Almost surely, 2^18336879169 is an apocalyptic number.

It is an amenable number.

18336879169 is a deficient number, since it is larger than the sum of its proper divisors (2619554175).

18336879169 is an equidigital number, since it uses as much as digits as its factorization.

18336879169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619554174.

The product of its digits is 11757312, while the sum is 61.

The spelling of 18336879169 in words is "eighteen billion, three hundred thirty-six million, eight hundred seventy-nine thousand, one hundred sixty-nine".