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18680771060 = 2257211632389
BaseRepresentation
bin10001011001011101…
…011111000111110100
31210012220011111100122
4101121131133013310
5301224234133220
612325401431112
71230632635250
oct213135370764
953186144318
1018680771060
117a16898876
12375419b498
1319b92994b3
14c92ddb260
1574502d425
hex45975f1f4

18680771060 has 48 divisors (see below), whose sum is σ = 45046404480. Its totient is φ = 6374471040.

The previous prime is 18680771023. The next prime is 18680771069. The reversal of 18680771060 is 6017708681.

It is a super-2 number, since 2×186807710602 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680771069) 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, 286655 + ... + 345734.

It is an arithmetic number, because the mean of its divisors is an integer number (938466760).

Almost surely, 218680771060 is an apocalyptic number.

18680771060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18680771060 is an abundant number, since it is smaller than the sum of its proper divisors (26365633420).

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

18680771060 is a wasteful number, since it uses less digits than its factorization.

18680771060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632616 (or 632614 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 18680771060 in words is "eighteen billion, six hundred eighty million, seven hundred seventy-one thousand, sixty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 211 422 844 1055 1477 2110 2954 4220 5908 7385 14770 29540 632389 1264778 2529556 3161945 4426723 6323890 8853446 12647780 17706892 22133615 44267230 88534460 133434079 266868158 533736316 667170395 934038553 1334340790 1868077106 2668681580 3736154212 4670192765 9340385530 18680771060