Search a number
-
+
12009018 = 237240847
BaseRepresentation
bin101101110011…
…111000111010
3211121010021110
4231303320322
511033242033
61105221150
7204034500
oct55637072
924533243
1012009018
11686260a
1240317b6
132646138
141848670
1510c3363
hexb73e3a

12009018 has 24 divisors (see below), whose sum is σ = 27940032. Its totient is φ = 3431064.

The previous prime is 12008999. The next prime is 12009031. The reversal of 12009018 is 81090021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12008985 and 12009003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20130 + ... + 20717.

It is an arithmetic number, because the mean of its divisors is an integer number (1164168).

Almost surely, 212009018 is an apocalyptic number.

12009018 is an abundant number, since it is smaller than the sum of its proper divisors (15931014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12009018 is a wasteful number, since it uses less digits than its factorization.

12009018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40866 (or 40859 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 12009018 is about 3465.4030068666. The cubic root of 12009018 is about 229.0001843340. Note that the first 3 decimals are identical.

Adding to 12009018 its reverse (81090021), we get a palindrome (93099039).

The spelling of 12009018 in words is "twelve million, nine thousand, eighteen".

Divisors: 1 2 3 6 7 14 21 42 49 98 147 294 40847 81694 122541 245082 285929 571858 857787 1715574 2001503 4003006 6004509 12009018