18672233 has 8 divisors (see below), whose sum is σ = 18981000. Its totient is φ = 18366208.

The previous prime is 18672221. The next prime is 18672253. The reversal of 18672233 is 33227681.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3988009 + 14684224 = 1997^2 + 3832^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18672233 - 2⁸ = 18671977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18672233.

It is not an unprimeable number, because it can be changed into a prime (18672253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16283 + ... + 17391.

It is an arithmetic number, because the mean of its divisors is an integer number (2372625).

Almost surely, 2^18672233 is an apocalyptic number.

It is an amenable number.

18672233 is a deficient number, since it is larger than the sum of its proper divisors (308767).

18672233 is a wasteful number, since it uses less digits than its factorization.

18672233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371.

The product of its digits is 12096, while the sum is 32.

The square root of 18672233 is about 4321.1379288331. The cubic root of 18672233 is about 265.2968454759.

The spelling of 18672233 in words is "eighteen million, six hundred seventy-two thousand, two hundred thirty-three".