18406233 has 12 divisors (see below), whose sum is σ = 27743040. Its totient is φ = 11737176.

The previous prime is 18406229. The next prime is 18406319. The reversal of 18406233 is 33260481.

It is a happy number.

It is not a de Polignac number, because 18406233 - 2² = 18406229 is a prime.

18406233 is a modest number, since divided by 6233 gives 184 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18406197 and 18406206.

It is not an unprimeable number, because it can be changed into a prime (18404233) 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 11 ways as a sum of consecutive naturals, for example, 44253 + ... + 44666.

It is an arithmetic number, because the mean of its divisors is an integer number (2311920).

Almost surely, 2^18406233 is an apocalyptic number.

It is an amenable number.

18406233 is a deficient number, since it is larger than the sum of its proper divisors (9336807).

18406233 is a wasteful number, since it uses less digits than its factorization.

18406233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88948 (or 88945 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18406233 is about 4290.2485941959. The cubic root of 18406233 is about 264.0310311320.

The spelling of 18406233 in words is "eighteen million, four hundred six thousand, two hundred thirty-three".