18118195 has 4 divisors (see below), whose sum is σ = 21741840. Its totient is φ = 14494552.

The previous prime is 18118193. The next prime is 18118211. The reversal of 18118195 is 59181181.

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 18118195 - 2¹ = 18118193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18118195.

It is not an unprimeable number, because it can be changed into a prime (18118193) 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, 1811815 + ... + 1811824.

It is an arithmetic number, because the mean of its divisors is an integer number (5435460).

Almost surely, 2^18118195 is an apocalyptic number.

18118195 is a deficient number, since it is larger than the sum of its proper divisors (3623645).

18118195 is an equidigital number, since it uses as much as digits as its factorization.

18118195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623644.

The product of its digits is 2880, while the sum is 34.

The square root of 18118195 is about 4256.5473097336. The cubic root of 18118195 is about 262.6465153345.

The spelling of 18118195 in words is "eighteen million, one hundred eighteen thousand, one hundred ninety-five".