23133218 has 4 divisors (see below), whose sum is σ = 34699830. Its totient is φ = 11566608.

The previous prime is 23133199. The next prime is 23133263. The reversal of 23133218 is 81233132.

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

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 3214849 = 4463^2 + 1793^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23133193 and 23133202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783303 + ... + 5783306.

Almost surely, 2^23133218 is an apocalyptic number.

23133218 is a deficient number, since it is larger than the sum of its proper divisors (11566612).

23133218 is a wasteful number, since it uses less digits than its factorization.

23133218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566611.

The product of its digits is 864, while the sum is 23.

The square root of 23133218 is about 4809.7004064702. The cubic root of 23133218 is about 284.9347054687.

The spelling of 23133218 in words is "twenty-three million, one hundred thirty-three thousand, two hundred eighteen".