18044505 has 32 divisors (see below), whose sum is σ = 32536320. Its totient is φ = 9486720.

The previous prime is 18044479. The next prime is 18044519. The reversal of 18044505 is 50544081.

It is not a de Polignac number, because 18044505 - 2⁵ = 18044473 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8940 + ... + 10770.

It is an arithmetic number, because the mean of its divisors is an integer number (1016760).

Almost surely, 2^18044505 is an apocalyptic number.

18044505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18044505 is a deficient number, since it is larger than the sum of its proper divisors (14491815).

18044505 is a wasteful number, since it uses less digits than its factorization.

18044505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1912 counting only the distinct ones).

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

The square root of 18044505 is about 4247.8824136268. The cubic root of 18044505 is about 262.2899544209.

Adding to 18044505 its reverse (50544081), we get a palindrome (68588586).

The spelling of 18044505 in words is "eighteen million, forty-four thousand, five hundred five".