18030436 has 18 divisors (see below), whose sum is σ = 32988662. Its totient is φ = 8622240.

The previous prime is 18030427. The next prime is 18030451. The reversal of 18030436 is 63403081.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 2742336 = 3910^2 + 1656^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18030436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2145 + ... + 6376.

Almost surely, 2^18030436 is an apocalyptic number.

It is an amenable number.

18030436 is a deficient number, since it is larger than the sum of its proper divisors (14958226).

18030436 is a wasteful number, since it uses less digits than its factorization.

18030436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571 (or 8546 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 18030436 is about 4246.2260891290. The cubic root of 18030436 is about 262.2217689939.

The spelling of 18030436 in words is "eighteen million, thirty thousand, four hundred thirty-six".