18138111093 has 6 divisors (see below), whose sum is σ = 26199493814. Its totient is φ = 12092074056.

The previous prime is 18138111077. The next prime is 18138111107. The reversal of 18138111093 is 39011183181.

18138111093 is a `hidden beast` number, since 1 + 81 + 381 + 110 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10157011524 + 7981099569 = 100782^2 + 89337^2 .

It is not a de Polignac number, because 18138111093 - 2⁴ = 18138111077 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 (18138111023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1007672830 + ... + 1007672847.

Almost surely, 2^18138111093 is an apocalyptic number.

It is an amenable number.

18138111093 is a deficient number, since it is larger than the sum of its proper divisors (8061382721).

18138111093 is a wasteful number, since it uses less digits than its factorization.

18138111093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015345683 (or 2015345680 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 18138111093 in words is "eighteen billion, one hundred thirty-eight million, one hundred eleven thousand, ninety-three".