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23130112220 = 2251773765203
BaseRepresentation
bin10101100010101010…
…011000000011011100
32012200222101102222222
4111202222120003130
5334332302042340
614343102324512
71446120465335
oct254252300334
965628342888
1023130112220
11989a388726
124596289738
132248016a47
141195cbb28c
159059618b5
hex562a980dc

23130112220 has 24 divisors (see below), whose sum is σ = 48576719184. Its totient is φ = 9251381376.

The previous prime is 23130112199. The next prime is 23130112261. The reversal of 23130112220 is 2221103132.

It is a congruent number.

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, 322139 + ... + 387341.

It is an arithmetic number, because the mean of its divisors is an integer number (2024029966).

Almost surely, 223130112220 is an apocalyptic number.

23130112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23130112220 is an abundant number, since it is smaller than the sum of its proper divisors (25446606964).

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

23130112220 is a wasteful number, since it uses less digits than its factorization.

23130112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82949 (or 82947 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23130112220 its reverse (2221103132), we get a palindrome (25351215352).

The spelling of 23130112220 in words is "twenty-three billion, one hundred thirty million, one hundred twelve thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 17737 35474 65203 70948 88685 130406 177370 260812 326015 354740 652030 1304060 1156505611 2313011222 4626022444 5782528055 11565056110 23130112220