18998095 has 8 divisors (see below), whose sum is σ = 24138864. Its totient is φ = 14304384.

The previous prime is 18998093. The next prime is 18998101. The reversal of 18998095 is 59089981.

It is a happy number.

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 18998095 - 2¹ = 18998093 is a prime.

It is a super-2 number, since 2×18998095² = 721855227258050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18998093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111669 + ... + 111838.

It is an arithmetic number, because the mean of its divisors is an integer number (3017358).

Almost surely, 2^18998095 is an apocalyptic number.

18998095 is a deficient number, since it is larger than the sum of its proper divisors (5140769).

18998095 is a wasteful number, since it uses less digits than its factorization.

18998095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223529.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 18998095 is about 4358.6804195765. The cubic root of 18998095 is about 266.8312464949.

The spelling of 18998095 in words is "eighteen million, nine hundred ninety-eight thousand, ninety-five".