18324556 has 6 divisors (see below), whose sum is σ = 32067980. Its totient is φ = 9162276.

The previous prime is 18324547. The next prime is 18324557. The reversal of 18324556 is 65542381.

It is not an unprimeable number, because it can be changed into a prime (18324557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2290566 + ... + 2290573.

Almost surely, 2^18324556 is an apocalyptic number.

It is an amenable number.

18324556 is a deficient number, since it is larger than the sum of its proper divisors (13743424).

18324556 is a wasteful number, since it uses less digits than its factorization.

18324556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581143 (or 4581141 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 18324556 is about 4280.7190984693. The cubic root of 18324556 is about 263.6399092810.

The spelling of 18324556 in words is "eighteen million, three hundred twenty-four thousand, five hundred fifty-six".