18144550 has 48 divisors (see below), whose sum is σ = 35435232. Its totient is φ = 6905600.

The previous prime is 18144527. The next prime is 18144551. The reversal of 18144550 is 5544181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108567 + ... + 108733.

It is an arithmetic number, because the mean of its divisors is an integer number (738234).

Almost surely, 2^18144550 is an apocalyptic number.

18144550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18144550 is a deficient number, since it is larger than the sum of its proper divisors (17290682).

18144550 is a wasteful number, since it uses less digits than its factorization.

18144550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 18144550 is about 4259.6420037369. The cubic root of 18144550 is about 262.7738034982.

The spelling of 18144550 in words is "eighteen million, one hundred forty-four thousand, five hundred fifty".