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20618082060 = 22352707126943
BaseRepresentation
bin10011001100111011…
…101111011100001100
31222012220120002102220
4103030323233130030
5314211212111220
613245525015340
71326635543262
oct231473573414
958186502386
1020618082060
118820408244
123bb4b54550
131c37764974
14dd8418432
1580a15b540
hex4cceef70c

20618082060 has 48 divisors (see below), whose sum is σ = 57752411136. Its totient is φ = 5496080832.

The previous prime is 20618082053. The next prime is 20618082061. The reversal of 20618082060 is 6028081602.

It is not an unprimeable number, because it can be changed into a prime (20618082061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98949 + ... + 225891.

It is an arithmetic number, because the mean of its divisors is an integer number (1203175232).

Almost surely, 220618082060 is an apocalyptic number.

20618082060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20618082060 is an abundant number, since it is smaller than the sum of its proper divisors (37134329076).

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

20618082060 is a wasteful number, since it uses less digits than its factorization.

20618082060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129662 (or 129660 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 20618082060 in words is "twenty billion, six hundred eighteen million, eighty-two thousand, sixty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 2707 5414 8121 10828 13535 16242 27070 32484 40605 54140 81210 126943 162420 253886 380829 507772 634715 761658 1269430 1523316 1904145 2538860 3808290 7616580 343634701 687269402 1030904103 1374538804 1718173505 2061808206 3436347010 4123616412 5154520515 6872694020 10309041030 20618082060