18898195 has 4 divisors (see below), whose sum is σ = 22677840. Its totient is φ = 15118552.

The previous prime is 18898193. The next prime is 18898241. The reversal of 18898195 is 59189881.

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 18898195 - 2¹ = 18898193 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18898193) 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, 1889815 + ... + 1889824.

It is an arithmetic number, because the mean of its divisors is an integer number (5669460).

Almost surely, 2^18898195 is an apocalyptic number.

18898195 is a deficient number, since it is larger than the sum of its proper divisors (3779645).

18898195 is an equidigital number, since it uses as much as digits as its factorization.

18898195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779644.

The product of its digits is 207360, while the sum is 49.

The square root of 18898195 is about 4347.2054241777. The cubic root of 18898195 is about 266.3627205347.

The spelling of 18898195 in words is "eighteen million, eight hundred ninety-eight thousand, one hundred ninety-five".