18004545 has 32 divisors (see below), whose sum is σ = 34473600. Its totient is φ = 8862912.

The previous prime is 18004541. The next prime is 18004579. The reversal of 18004545 is 54540081.

It is not a de Polignac number, because 18004545 - 2² = 18004541 is a prime.

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

18004545 is a modest number, since divided by 4545 gives 1800 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18004541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3375 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^18004545 is an apocalyptic number.

18004545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18004545 is a deficient number, since it is larger than the sum of its proper divisors (16469055).

18004545 is a wasteful number, since it uses less digits than its factorization.

18004545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10286 (or 10280 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 18004545 is about 4243.1762866984. The cubic root of 18004545 is about 262.0961954713.

The spelling of 18004545 in words is "eighteen million, four thousand, five hundred forty-five".