18234813 has 16 divisors (see below), whose sum is σ = 25721280. Its totient is φ = 11458944.

The previous prime is 18234793. The next prime is 18234817. The reversal of 18234813 is 31843281.

It is not a de Polignac number, because 18234813 - 2⁵ = 18234781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234817) 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, 12595 + ... + 13967.

It is an arithmetic number, because the mean of its divisors is an integer number (1607580).

Almost surely, 2^18234813 is an apocalyptic number.

It is an amenable number.

18234813 is a deficient number, since it is larger than the sum of its proper divisors (7486467).

18234813 is a wasteful number, since it uses less digits than its factorization.

18234813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628.

The product of its digits is 4608, while the sum is 30.

The square root of 18234813 is about 4270.2239988085. The cubic root of 18234813 is about 263.2088198758.

The spelling of 18234813 in words is "eighteen million, two hundred thirty-four thousand, eight hundred thirteen".