18233973 has 12 divisors (see below), whose sum is σ = 26434720. Its totient is φ = 12111336.

The previous prime is 18233951. The next prime is 18234001. The reversal of 18233973 is 37933281.

It is a happy number.

It is not a de Polignac number, because 18233973 - 2⁶ = 18233909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18233903) 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, 1033 + ... + 6126.

Almost surely, 2^18233973 is an apocalyptic number.

It is an amenable number.

18233973 is a deficient number, since it is larger than the sum of its proper divisors (8200747).

18233973 is a wasteful number, since it uses less digits than its factorization.

18233973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448 (or 7445 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 18233973 is about 4270.1256421796. The cubic root of 18233973 is about 263.2047781781.

The spelling of 18233973 in words is "eighteen million, two hundred thirty-three thousand, nine hundred seventy-three".