18234379799 has 4 divisors (see below), whose sum is σ = 18533304120. Its totient is φ = 17935455480.

The previous prime is 18234379789. The next prime is 18234379873. The reversal of 18234379799 is 99797343281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99797343281 = 61 ⋅1636022021.

It is a cyclic number.

It is not a de Polignac number, because 18234379799 - 2²⁰ = 18233331223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234379759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149462069 + ... + 149462190.

It is an arithmetic number, because the mean of its divisors is an integer number (4633326030).

Almost surely, 2^18234379799 is an apocalyptic number.

18234379799 is a deficient number, since it is larger than the sum of its proper divisors (298924321).

18234379799 is an equidigital number, since it uses as much as digits as its factorization.

18234379799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298924320.

The product of its digits is 20575296, while the sum is 62.

The spelling of 18234379799 in words is "eighteen billion, two hundred thirty-four million, three hundred seventy-nine thousand, seven hundred ninety-nine".