18485215 has 16 divisors (see below), whose sum is σ = 26454528. Its totient is φ = 12123936.

The previous prime is 18485191. The next prime is 18485249. The reversal of 18485215 is 51258481.

It is a cyclic number.

It is not a de Polignac number, because 18485215 - 2⁷ = 18485087 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 15 ways as a sum of consecutive naturals, for example, 10677 + ... + 12286.

It is an arithmetic number, because the mean of its divisors is an integer number (1653408).

Almost surely, 2^18485215 is an apocalyptic number.

18485215 is a deficient number, since it is larger than the sum of its proper divisors (7969313).

18485215 is a wasteful number, since it uses less digits than its factorization.

18485215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22998.

The product of its digits is 12800, while the sum is 34.

The square root of 18485215 is about 4299.4435686493. The cubic root of 18485215 is about 264.4081487048.

The spelling of 18485215 in words is "eighteen million, four hundred eighty-five thousand, two hundred fifteen".