18015345 has 16 divisors (see below), whose sum is σ = 32027520. Its totient is φ = 9608112.

The previous prime is 18015343. The next prime is 18015353. The reversal of 18015345 is 54351081.

It is not a de Polignac number, because 18015345 - 2¹ = 18015343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18015343) 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 15 ways as a sum of consecutive naturals, for example, 66589 + ... + 66858.

It is an arithmetic number, because the mean of its divisors is an integer number (2001720).

Almost surely, 2^18015345 is an apocalyptic number.

18015345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18015345 is a deficient number, since it is larger than the sum of its proper divisors (14012175).

18015345 is a wasteful number, since it uses less digits than its factorization.

18015345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133461 (or 133455 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18015345 is about 4244.4487274557. The cubic root of 18015345 is about 262.1485910029.

The spelling of 18015345 in words is "eighteen million, fifteen thousand, three hundred forty-five".