18198115 has 16 divisors (see below), whose sum is σ = 23688000. Its totient is φ = 13341312.

The previous prime is 18198091. The next prime is 18198139. The reversal of 18198115 is 51189181.

It is an interprime number because it is at equal distance from previous prime (18198091) and next prime (18198139).

It is a cyclic number.

It is not a de Polignac number, because 18198115 - 2¹³ = 18189923 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8746 + ... + 10624.

It is an arithmetic number, because the mean of its divisors is an integer number (1480500).

Almost surely, 2^18198115 is an apocalyptic number.

18198115 is a deficient number, since it is larger than the sum of its proper divisors (5489885).

18198115 is a wasteful number, since it uses less digits than its factorization.

18198115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

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

The square root of 18198115 is about 4265.9248704120. The cubic root of 18198115 is about 263.0321299303.

The spelling of 18198115 in words is "eighteen million, one hundred ninety-eight thousand, one hundred fifteen".