18223413 has 16 divisors (see below), whose sum is σ = 27545280. Its totient is φ = 10623744.

The previous prime is 18223411. The next prime is 18223417. The reversal of 18223413 is 31432281.

It is not a de Polignac number, because 18223413 - 2¹ = 18223411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18223411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11556 + ... + 13037.

It is an arithmetic number, because the mean of its divisors is an integer number (1721580).

Almost surely, 2^18223413 is an apocalyptic number.

18223413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18223413 is a deficient number, since it is larger than the sum of its proper divisors (9321867).

18223413 is a wasteful number, since it uses less digits than its factorization.

18223413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24628.

The product of its digits is 1152, while the sum is 24.

The square root of 18223413 is about 4268.8889655272. Note that the first 3 decimals coincide. The cubic root of 18223413 is about 263.1539576723.

Adding to 18223413 its reverse (31432281), we get a palindrome (49655694).

The spelling of 18223413 in words is "eighteen million, two hundred twenty-three thousand, four hundred thirteen".