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18032274108 = 2234255121817
BaseRepresentation
bin10000110010110011…
…101010101010111100
31201112200220102210000
4100302303222222330
5243412230232413
612141154114300
71205566541502
oct206263525274
951480812700
1018032274108
117713826482
1235b2b7b990
131914b206a4
14c30c2c672
15708131073
hex432ceaabc

18032274108 has 60 divisors (see below), whose sum is σ = 47160566992. Its totient is φ = 6008126400.

The previous prime is 18032274103. The next prime is 18032274131. The reversal of 18032274108 is 80147223081.

18032274108 is a `hidden beast` number, since 18 + 0 + 3 + 227 + 410 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18032274103) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 815616 + ... + 837432.

Almost surely, 218032274108 is an apocalyptic number.

18032274108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18032274108 is an abundant number, since it is smaller than the sum of its proper divisors (29128292884).

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

18032274108 is a wasteful number, since it uses less digits than its factorization.

18032274108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24384 (or 24373 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

Adding to 18032274108 its reverse (80147223081), we get a palindrome (98179497189).

It can be divided in two parts, 1803 and 2274108, that added together give a triangular number (2275911 = T2133).

The spelling of 18032274108 in words is "eighteen billion, thirty-two million, two hundred seventy-four thousand, one hundred eight".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 81 108 162 324 2551 5102 7653 10204 15306 21817 22959 30612 43634 45918 65451 68877 87268 91836 130902 137754 196353 206631 261804 275508 392706 413262 589059 785412 826524 1178118 1767177 2356236 3534354 7068708 55655167 111310334 166965501 222620668 333931002 500896503 667862004 1001793006 1502689509 2003586012 3005379018 4508068527 6010758036 9016137054 18032274108