18098145 has 24 divisors (see below), whose sum is σ = 33784296. Its totient is φ = 8909568.

The previous prime is 18098137. The next prime is 18098147. The reversal of 18098145 is 54189081.

It can be written as a sum of positive squares in 4 ways, for example, as 154449 + 17943696 = 393^2 + 4236^2 .

It is not a de Polignac number, because 18098145 - 2³ = 18098137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18098147) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14884 + ... + 16053.

It is an arithmetic number, because the mean of its divisors is an integer number (1407679).

Almost surely, 2^18098145 is an apocalyptic number.

18098145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18098145 is a deficient number, since it is larger than the sum of its proper divisors (15686151).

18098145 is a wasteful number, since it uses less digits than its factorization.

18098145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30961 (or 30958 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18098145 is about 4254.1914625461. The cubic root of 18098145 is about 262.5495960710.

The spelling of 18098145 in words is "eighteen million, ninety-eight thousand, one hundred forty-five".