18041684 has 6 divisors (see below), whose sum is σ = 31572954. Its totient is φ = 9020840.

The previous prime is 18041671. The next prime is 18041711. The reversal of 18041684 is 48614081.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 4937284 = 3620^2 + 2222^2 .

It is a super-3 number, since 3×18041684³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18041684.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2255207 + ... + 2255214.

It is an arithmetic number, because the mean of its divisors is an integer number (5262159).

Almost surely, 2^18041684 is an apocalyptic number.

It is an amenable number.

18041684 is a deficient number, since it is larger than the sum of its proper divisors (13531270).

18041684 is a wasteful number, since it uses less digits than its factorization.

18041684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510425 (or 4510423 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18041684 is about 4247.5503528505. The cubic root of 18041684 is about 262.2762852822.

The spelling of 18041684 in words is "eighteen million, forty-one thousand, six hundred eighty-four".