18105751121 has 4 divisors (see below), whose sum is σ = 18140370672. Its totient is φ = 18071131572.

The previous prime is 18105751093. The next prime is 18105751123. The reversal of 18105751121 is 12115750181.

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.

It is a cyclic number.

It is not a de Polignac number, because 18105751121 - 2¹⁰ = 18105750097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18105751123) 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, 17308991 + ... + 17310036.

It is an arithmetic number, because the mean of its divisors is an integer number (4535092668).

Almost surely, 2^18105751121 is an apocalyptic number.

It is an amenable number.

18105751121 is a deficient number, since it is larger than the sum of its proper divisors (34619551).

18105751121 is an equidigital number, since it uses as much as digits as its factorization.

18105751121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34619550.

The product of its (nonzero) digits is 2800, while the sum is 32.

The spelling of 18105751121 in words is "eighteen billion, one hundred five million, seven hundred fifty-one thousand, one hundred twenty-one".