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18103145 = 54019029
BaseRepresentation
bin100010100001…
…1101101101001
31021001201211212
41011003231221
514113300040
61444002505
7306605564
oct105035551
937051755
1018103145
11a245185
126090435
13399ac28
1425934db
1518c8d65
hex1143b69

18103145 has 8 divisors (see below), whose sum is σ = 21780360. Its totient is φ = 14444800.

The previous prime is 18103133. The next prime is 18103159. The reversal of 18103145 is 54130181.

It can be written as a sum of positive squares in 4 ways, for example, as 13402921 + 4700224 = 3661^2 + 2168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18103145 - 26 = 18103081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18103145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510 + ... + 6519.

It is an arithmetic number, because the mean of its divisors is an integer number (2722545).

Almost surely, 218103145 is an apocalyptic number.

It is an amenable number.

18103145 is a deficient number, since it is larger than the sum of its proper divisors (3677215).

18103145 is an equidigital number, since it uses as much as digits as its factorization.

18103145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9435.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 18103145 is about 4254.7790776960. The cubic root of 18103145 is about 262.5737721603.

The spelling of 18103145 in words is "eighteen million, one hundred three thousand, one hundred forty-five".

Divisors: 1 5 401 2005 9029 45145 3620629 18103145