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20812706060 = 2254397347719
BaseRepresentation
bin10011011000100010…
…001011000100001100
31222201110210000101012
4103120202023010030
5320111023043220
613321120304352
71334521040216
oct233042130414
958643700335
1020812706060
118910259123
12404a1720b8
131c68b88cb3
1410161db5b6
1581c2a2ac5
hex4d888b10c

20812706060 has 96 divisors (see below), whose sum is σ = 45377418240. Its totient is φ = 8013293568.

The previous prime is 20812706029. The next prime is 20812706081. The reversal of 20812706060 is 6060721802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28946381 + ... + 28947099.

It is an arithmetic number, because the mean of its divisors is an integer number (472681440).

Almost surely, 220812706060 is an apocalyptic number.

20812706060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20812706060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22688709120).

20812706060 is an abundant number, since it is smaller than the sum of its proper divisors (24564712180).

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

20812706060 is a wasteful number, since it uses less digits than its factorization.

20812706060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215 (or 1213 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 20812706060 in words is "twenty billion, eight hundred twelve million, seven hundred six thousand, sixty".

Divisors: 1 2 4 5 10 20 43 86 97 172 194 215 347 388 430 485 694 719 860 970 1388 1438 1735 1940 2876 3470 3595 4171 6940 7190 8342 14380 14921 16684 20855 29842 30917 33659 41710 59684 61834 67318 69743 74605 83420 123668 134636 139486 149210 154585 168295 249493 278972 298420 309170 336590 348715 498986 618340 673180 697430 997972 1247465 1394860 1447337 2494930 2894674 2998949 4989860 5789348 5997898 7236685 10728199 11995796 14473370 14994745 21456398 24200821 28946740 29989490 42912796 48401642 53640995 59978980 96803284 107281990 121004105 214563980 242008210 484016420 1040635303 2081270606 4162541212 5203176515 10406353030 20812706060