18043036 has 24 divisors (see below), whose sum is σ = 34740720. Its totient is φ = 8198960.

The previous prime is 18043019. The next prime is 18043057. The reversal of 18043036 is 63034081.

It is a super-2 number, since 2×18043036² = 651102296194592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18043036.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3630 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (1447530).

Almost surely, 2^18043036 is an apocalyptic number.

It is an amenable number.

18043036 is a deficient number, since it is larger than the sum of its proper divisors (16697684).

18043036 is a wasteful number, since it uses less digits than its factorization.

18043036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426 (or 3402 counting only the distinct ones).

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

The square root of 18043036 is about 4247.7095004249. The cubic root of 18043036 is about 262.2828365679.

The spelling of 18043036 in words is "eighteen million, forty-three thousand, thirty-six".