18216245 has 8 divisors (see below), whose sum is σ = 22032384. Its totient is φ = 14457744.

The previous prime is 18216241. The next prime is 18216277. The reversal of 18216245 is 54261281.

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 18216245 - 2² = 18216241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18216241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13709 + ... + 14978.

It is an arithmetic number, because the mean of its divisors is an integer number (2754048).

Almost surely, 2^18216245 is an apocalyptic number.

It is an amenable number.

18216245 is a deficient number, since it is larger than the sum of its proper divisors (3816139).

18216245 is a wasteful number, since it uses less digits than its factorization.

18216245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28819.

The product of its digits is 3840, while the sum is 29.

The square root of 18216245 is about 4268.0493202399. The cubic root of 18216245 is about 263.1194501418.

The spelling of 18216245 in words is "eighteen million, two hundred sixteen thousand, two hundred forty-five".