18133712 has 10 divisors (see below), whose sum is σ = 35134098. Its totient is φ = 9066848.

The previous prime is 18133699. The next prime is 18133721. The reversal of 18133712 is 21733181.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 2483776 = 3956^2 + 1576^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566663 + ... + 566694.

Almost surely, 2^18133712 is an apocalyptic number.

It is an amenable number.

18133712 is a deficient number, since it is larger than the sum of its proper divisors (17000386).

18133712 is a wasteful number, since it uses less digits than its factorization.

18133712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133365 (or 1133359 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 18133712 is about 4258.3696410716. The cubic root of 18133712 is about 262.7214735569.

Adding to 18133712 its reverse (21733181), we get a palindrome (39866893).

The spelling of 18133712 in words is "eighteen million, one hundred thirty-three thousand, seven hundred twelve".