18104493 has 16 divisors (see below), whose sum is σ = 26978112. Its totient is φ = 10704000.

The previous prime is 18104483. The next prime is 18104533. The reversal of 18104493 is 39440181.

It is a happy number.

It is not a de Polignac number, because 18104493 - 2⁵ = 18104461 is a prime.

It is a super-3 number, since 3×18104493³ (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 18104493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18104453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5338 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (1686132).

Almost surely, 2^18104493 is an apocalyptic number.

It is an amenable number.

18104493 is a deficient number, since it is larger than the sum of its proper divisors (8873619).

18104493 is a wasteful number, since it uses less digits than its factorization.

18104493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18104493 is about 4254.9374848522. The cubic root of 18104493 is about 262.5802892721.

The spelling of 18104493 in words is "eighteen million, one hundred four thousand, four hundred ninety-three".