18148545 has 12 divisors (see below), whose sum is σ = 31457556. Its totient is φ = 9679200.

The previous prime is 18148513. The next prime is 18148549. The reversal of 18148545 is 54584181.

It can be written as a sum of positive squares in 2 ways, for example, as 5253264 + 12895281 = 2292^2 + 3591^2 .

It is not a de Polignac number, because 18148545 - 2⁵ = 18148513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18148549) 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 11 ways as a sum of consecutive naturals, for example, 201606 + ... + 201695.

It is an arithmetic number, because the mean of its divisors is an integer number (2621463).

Almost surely, 2^18148545 is an apocalyptic number.

18148545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18148545 is a deficient number, since it is larger than the sum of its proper divisors (13309011).

18148545 is a wasteful number, since it uses less digits than its factorization.

18148545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403312 (or 403309 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 18148545 is about 4260.1109140491. The cubic root of 18148545 is about 262.7930876048.

The spelling of 18148545 in words is "eighteen million, one hundred forty-eight thousand, five hundred forty-five".