18118364 has 24 divisors (see below), whose sum is σ = 34700400. Its totient is φ = 8209280.

The previous prime is 18118361. The next prime is 18118367. The reversal of 18118364 is 46381181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18118361) and next prime (18118367).

It is a super-2 number, since 2×18118364² = 656550228072992, 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 18118364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21992 + ... + 22800.

It is an arithmetic number, because the mean of its divisors is an integer number (1445850).

Almost surely, 2^18118364 is an apocalyptic number.

It is an amenable number.

18118364 is a deficient number, since it is larger than the sum of its proper divisors (16582036).

18118364 is a wasteful number, since it uses less digits than its factorization.

18118364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1331 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 18118364 is about 4256.5671614577. The cubic root of 18118364 is about 262.6473319560.

The spelling of 18118364 in words is "eighteen million, one hundred eighteen thousand, three hundred sixty-four".