18868823 has 4 divisors (see below), whose sum is σ = 18888360. Its totient is φ = 18849288.

The previous prime is 18868813. The next prime is 18868831. The reversal of 18868823 is 32886881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18868823 - 2⁴ = 18868807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8240 + ... + 10277.

It is an arithmetic number, because the mean of its divisors is an integer number (4722090).

Almost surely, 2^18868823 is an apocalyptic number.

18868823 is a deficient number, since it is larger than the sum of its proper divisors (19537).

18868823 is a wasteful number, since it uses less digits than its factorization.

18868823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19536.

The product of its digits is 147456, while the sum is 44.

The square root of 18868823 is about 4343.8258482587. The cubic root of 18868823 is about 266.2246533359.

It can be divided in two parts, 18868 and 823, that added together give a palindrome (19691).

The spelling of 18868823 in words is "eighteen million, eight hundred sixty-eight thousand, eight hundred twenty-three".