18145039 has 12 divisors (see below), whose sum is σ = 20636280. Its totient is φ = 15923600.

The previous prime is 18145033. The next prime is 18145063. The reversal of 18145039 is 93054181.

It is not a de Polignac number, because 18145039 - 2³ = 18145031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18145039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18145031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 924 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (1719690).

Almost surely, 2^18145039 is an apocalyptic number.

18145039 is a deficient number, since it is larger than the sum of its proper divisors (2491241).

18145039 is a wasteful number, since it uses less digits than its factorization.

18145039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222 (or 5211 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18145039 is about 4259.6994025400. The cubic root of 18145039 is about 262.7761640828.

The spelling of 18145039 in words is "eighteen million, one hundred forty-five thousand, thirty-nine".