18268823 has 16 divisors (see below), whose sum is σ = 19845120. Its totient is φ = 16765056.

The previous prime is 18268807. The next prime is 18268849. The reversal of 18268823 is 32886281.

It is a cyclic number.

It is not a de Polignac number, because 18268823 - 2⁴ = 18268807 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268123) 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, 143786 + ... + 143912.

It is an arithmetic number, because the mean of its divisors is an integer number (1240320).

Almost surely, 2^18268823 is an apocalyptic number.

18268823 is a deficient number, since it is larger than the sum of its proper divisors (1576297).

18268823 is a wasteful number, since it uses less digits than its factorization.

18268823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its digits is 36864, while the sum is 38.

The square root of 18268823 is about 4274.2043704063. The cubic root of 18268823 is about 263.3723563740.

It can be divided in two parts, 18268 and 823, that added together give a palindrome (19091).

The spelling of 18268823 in words is "eighteen million, two hundred sixty-eight thousand, eight hundred twenty-three".