18143336 has 8 divisors (see below), whose sum is σ = 34018770. Its totient is φ = 9071664.

The previous prime is 18143329. The next prime is 18143341. The reversal of 18143336 is 63334181.

It can be written as a sum of positive squares in only one way, i.e., 15602500 + 2540836 = 3950^2 + 1594^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 18143299 and 18143308.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133951 + ... + 1133966.

Almost surely, 2^18143336 is an apocalyptic number.

It is an amenable number.

18143336 is a deficient number, since it is larger than the sum of its proper divisors (15875434).

18143336 is a wasteful number, since it uses less digits than its factorization.

18143336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267923 (or 2267919 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 18143336 is about 4259.4995011151. The cubic root of 18143336 is about 262.7679428860.

The spelling of 18143336 in words is "eighteen million, one hundred forty-three thousand, three hundred thirty-six".