18235321 has 8 divisors (see below), whose sum is σ = 19841864. Its totient is φ = 16657920.

The previous prime is 18235309. The next prime is 18235337. The reversal of 18235321 is 12353281.

It can be written as a sum of positive squares in 4 ways, for example, as 215296 + 18020025 = 464^2 + 4245^2 .

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 18235321 - 2⁵ = 18235289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18230321) 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, 5970 + ... + 8491.

It is an arithmetic number, because the mean of its divisors is an integer number (2480233).

Almost surely, 2^18235321 is an apocalyptic number.

It is an amenable number.

18235321 is a deficient number, since it is larger than the sum of its proper divisors (1606543).

18235321 is a wasteful number, since it uses less digits than its factorization.

18235321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14571.

The product of its digits is 1440, while the sum is 25.

The square root of 18235321 is about 4270.2834800514. The cubic root of 18235321 is about 263.2112640803.

The spelling of 18235321 in words is "eighteen million, two hundred thirty-five thousand, three hundred twenty-one".