18104553 has 20 divisors (see below), whose sum is σ = 27325188. Its totient is φ = 11944800.

The previous prime is 18104533. The next prime is 18104561. The reversal of 18104553 is 35540181.

18104553 is a `hidden beast` number, since 1 + 8 + 104 + 553 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17740944 + 363609 = 4212^2 + 603^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18104553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18104533) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7075 + ... + 9287.

Almost surely, 2^18104553 is an apocalyptic number.

It is an amenable number.

18104553 is a deficient number, since it is larger than the sum of its proper divisors (9220635).

18104553 is a wasteful number, since it uses less digits than its factorization.

18104553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18104553 is about 4254.9445354787. The cubic root of 18104553 is about 262.5805793437.

The spelling of 18104553 in words is "eighteen million, one hundred four thousand, five hundred fifty-three".