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12110030020 = 2251155045591
BaseRepresentation
bin10110100011101000…
…00110010011000100
31011020222011021011101
423101310012103010
5144300131430040
65321355545444
7606045361654
oct132164062304
934228137141
1012110030020
115154883880
12241b75b284
1311acbaa74a
1482c4a0364
154ad25709a
hex2d1d064c4

12110030020 has 24 divisors (see below), whose sum is σ = 27742978368. Its totient is φ = 4403647200.

The previous prime is 12110030003. The next prime is 12110030027. The reversal of 12110030020 is 2003001121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12110029979 and 12110030006.

It is not an unprimeable number, because it can be changed into a prime (12110030027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27522576 + ... + 27523015.

It is an arithmetic number, because the mean of its divisors is an integer number (1155957432).

Almost surely, 212110030020 is an apocalyptic number.

12110030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12110030020 is an abundant number, since it is smaller than the sum of its proper divisors (15632948348).

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

12110030020 is a wasteful number, since it uses less digits than its factorization.

12110030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55045611 (or 55045609 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 12110030020 its reverse (2003001121), we get a palindrome (14113031141).

The spelling of 12110030020 in words is "twelve billion, one hundred ten million, thirty thousand, twenty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 55045591 110091182 220182364 275227955 550455910 605501501 1100911820 1211003002 2422006004 3027507505 6055015010 12110030020