Search a number
-
+
18043999812 = 22322573116271
BaseRepresentation
bin10000110011100000…
…011001011001000100
31201120111222011102100
4100303200121121010
5243423230443222
612142253312100
71206101316306
oct206340313104
951514864370
1018043999812
11771a405143
1235b6a95630
131917397887
14c32601976
1570919a4ac
hex433819644

18043999812 has 72 divisors (see below), whose sum is σ = 45943252992. Its totient is φ = 5971046400.

The previous prime is 18043999807. The next prime is 18043999823. The reversal of 18043999812 is 21899934081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2874237 + ... + 2880507.

It is an arithmetic number, because the mean of its divisors is an integer number (638100736).

Almost surely, 218043999812 is an apocalyptic number.

18043999812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18043999812 is an abundant number, since it is smaller than the sum of its proper divisors (27899253180).

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

18043999812 is a wasteful number, since it uses less digits than its factorization.

18043999812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849 (or 6844 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 18043999812 in words is "eighteen billion, forty-three million, nine hundred ninety-nine thousand, eight hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 36 257 311 514 622 771 933 1028 1244 1542 1866 2313 2799 3084 3732 4626 5598 6271 9252 11196 12542 18813 25084 37626 56439 75252 79927 112878 159854 225756 239781 319708 479562 719343 959124 1438686 1611647 1950281 2877372 3223294 3900562 4834941 5850843 6446588 7801124 9669882 11701686 14504823 17552529 19339764 23403372 29009646 35105058 58019292 70210116 501222217 1002444434 1503666651 2004888868 3007333302 4510999953 6014666604 9021999906 18043999812