18188221105 has 8 divisors (see below), whose sum is σ = 22974595200. Its totient is φ = 13784756976.

The previous prime is 18188221081. The next prime is 18188221111. The reversal of 18188221105 is 50112288181.

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 18188221105 - 2¹¹ = 18188219057 is a prime.

It is a super-2 number, since 2×18188221105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95727385 + ... + 95727574.

It is an arithmetic number, because the mean of its divisors is an integer number (2871824400).

Almost surely, 2^18188221105 is an apocalyptic number.

It is an amenable number.

18188221105 is a deficient number, since it is larger than the sum of its proper divisors (4786374095).

18188221105 is a wasteful number, since it uses less digits than its factorization.

18188221105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191454983.

The product of its (nonzero) digits is 10240, while the sum is 37.

The spelling of 18188221105 in words is "eighteen billion, one hundred eighty-eight million, two hundred twenty-one thousand, one hundred five".