18121195 has 4 divisors (see below), whose sum is σ = 21745440. Its totient is φ = 14496952.

The previous prime is 18121163. The next prime is 18121211. The reversal of 18121195 is 59112181.

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 18121195 - 2⁵ = 18121163 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812115 + ... + 1812124.

It is an arithmetic number, because the mean of its divisors is an integer number (5436360).

Almost surely, 2^18121195 is an apocalyptic number.

18121195 is a deficient number, since it is larger than the sum of its proper divisors (3624245).

18121195 is an equidigital number, since it uses as much as digits as its factorization.

18121195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624244.

The product of its digits is 720, while the sum is 28.

The square root of 18121195 is about 4256.8996934389. The cubic root of 18121195 is about 262.6610108193.

The spelling of 18121195 in words is "eighteen million, one hundred twenty-one thousand, one hundred ninety-five".