18230405 has 8 divisors (see below), whose sum is σ = 23028000. Its totient is φ = 13816656.

The previous prime is 18230393. The next prime is 18230411. The reversal of 18230405 is 50403281.

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 18230405 - 2⁴ = 18230389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95855 + ... + 96044.

It is an arithmetic number, because the mean of its divisors is an integer number (2878500).

Almost surely, 2^18230405 is an apocalyptic number.

It is an amenable number.

18230405 is a deficient number, since it is larger than the sum of its proper divisors (4797595).

18230405 is a wasteful number, since it uses less digits than its factorization.

18230405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191923.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18230405 is about 4269.7078354379. The cubic root of 18230405 is about 263.1876092026.

Adding to 18230405 its reverse (50403281), we get a palindrome (68633686).

The spelling of 18230405 in words is "eighteen million, two hundred thirty thousand, four hundred five".