18240485 has 8 divisors (see below), whose sum is σ = 21953400. Its totient is φ = 14549184.

The previous prime is 18240479. The next prime is 18240511. The reversal of 18240485 is 58404281.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8797156 + 9443329 = 2966^2 + 3073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18240485 - 2¹⁰ = 18239461 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3482 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (2744175).

Almost surely, 2^18240485 is an apocalyptic number.

It is an amenable number.

18240485 is a deficient number, since it is larger than the sum of its proper divisors (3712915).

18240485 is a wasteful number, since it uses less digits than its factorization.

18240485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10807.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 18240485 is about 4270.8880809499. Note that the first 3 decimals coincide. The cubic root of 18240485 is about 263.2361077100.

The spelling of 18240485 in words is "eighteen million, two hundred forty thousand, four hundred eighty-five".