18039485 has 4 divisors (see below), whose sum is σ = 21647388. Its totient is φ = 14431584.

The previous prime is 18039449. The next prime is 18039491. The reversal of 18039485 is 58493081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3378244 + 14661241 = 1838^2 + 3829^2 .

It is a cyclic number.

It is not a de Polignac number, because 18039485 - 2¹⁴ = 18023101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803944 + ... + 1803953.

It is an arithmetic number, because the mean of its divisors is an integer number (5411847).

Almost surely, 2^18039485 is an apocalyptic number.

It is an amenable number.

18039485 is a deficient number, since it is larger than the sum of its proper divisors (3607903).

18039485 is an equidigital number, since it uses as much as digits as its factorization.

18039485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607902.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18039485 is about 4247.2914898792. The cubic root of 18039485 is about 262.2656290525.

The spelling of 18039485 in words is "eighteen million, thirty-nine thousand, four hundred eighty-five".