18054638099 has 4 divisors (see below), whose sum is σ = 18059134440. Its totient is φ = 18050141760.

The previous prime is 18054638059. The next prime is 18054638131. The reversal of 18054638099 is 99083645081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18054638099 - 2²⁰ = 18053589523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18054638099.

It is not an unprimeable number, because it can be changed into a prime (18054638039) 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, 2242142 + ... + 2250179.

It is an arithmetic number, because the mean of its divisors is an integer number (4514783610).

Almost surely, 2^18054638099 is an apocalyptic number.

18054638099 is a deficient number, since it is larger than the sum of its proper divisors (4496341).

18054638099 is an equidigital number, since it uses as much as digits as its factorization.

18054638099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496340.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 18054638099 in words is "eighteen billion, fifty-four million, six hundred thirty-eight thousand, ninety-nine".