Search a number
-
+
12013023030 = 2351965931981
BaseRepresentation
bin10110011000000100…
…00010111100110110
31011000012121210120220
423030002002330312
5144100313214110
65304012435210
7603460003521
oct131402027466
934005553526
1012013023030
115105047008
1223b3178b06
131195a74368
1481d64bbb8
154a4994370
hex2cc082f36

12013023030 has 64 divisors (see below), whose sum is σ = 30395692800. Its totient is φ = 3030168960.

The previous prime is 12013023019. The next prime is 12013023031. The reversal of 12013023030 is 3032031021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013023031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359640 + ... + 391620.

It is an arithmetic number, because the mean of its divisors is an integer number (474932700).

Almost surely, 212013023030 is an apocalyptic number.

12013023030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12013023030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15197846400).

12013023030 is an abundant number, since it is smaller than the sum of its proper divisors (18382669770).

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

12013023030 is a wasteful number, since it uses less digits than its factorization.

12013023030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32669.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 12013023030 its reverse (3032031021), we get a palindrome (15045054051).

The spelling of 12013023030 in words is "twelve billion, thirteen million, twenty-three thousand, thirty".

Divisors: 1 2 3 5 6 10 15 19 30 38 57 95 114 190 285 570 659 1318 1977 3295 3954 6590 9885 12521 19770 25042 31981 37563 62605 63962 75126 95943 125210 159905 187815 191886 319810 375630 479715 607639 959430 1215278 1822917 3038195 3645834 6076390 9114585 18229170 21075479 42150958 63226437 105377395 126452874 210754790 316132185 400434101 632264370 800868202 1201302303 2002170505 2402604606 4004341010 6006511515 12013023030