18285293 has 12 divisors (see below), whose sum is σ = 19924308. Its totient is φ = 16773120.

The previous prime is 18285287. The next prime is 18285301. The reversal of 18285293 is 39258281.

It can be written as a sum of positive squares in 6 ways, for example, as 3020644 + 15264649 = 1738^2 + 3907^2 .

It is not a de Polignac number, because 18285293 - 2⁶ = 18285229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18285203) 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, 43223 + ... + 43643.

It is an arithmetic number, because the mean of its divisors is an integer number (1660359).

Almost surely, 2^18285293 is an apocalyptic number.

18285293 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18285293 is a deficient number, since it is larger than the sum of its proper divisors (1639015).

18285293 is a wasteful number, since it uses less digits than its factorization.

18285293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 691 counting only the distinct ones).

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

The square root of 18285293 is about 4276.1306107274. The cubic root of 18285293 is about 263.4514791472.

The spelling of 18285293 in words is "eighteen million, two hundred eighty-five thousand, two hundred ninety-three".