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18051842680 = 2353712197191
BaseRepresentation
bin10000110011111110…
…010100001001111000
31201121001201121210221
4100303332110021320
5243432232431210
612143133345424
71206225062644
oct206376241170
951531647727
1018051842680
117723881653
1235b9638274
131918bb2621
14c33683c24
15709be91da
hex433f94278

18051842680 has 32 divisors (see below), whose sum is σ = 41714396640. Its totient is φ = 7025581440.

The previous prime is 18051842671. The next prime is 18051842693. The reversal of 18051842680 is 8624815081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097116 + ... + 6100075.

It is an arithmetic number, because the mean of its divisors is an integer number (1303574895).

Almost surely, 218051842680 is an apocalyptic number.

18051842680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18051842680 is an abundant number, since it is smaller than the sum of its proper divisors (23662553960).

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

18051842680 is a wasteful number, since it uses less digits than its factorization.

18051842680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12197239 (or 12197235 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 18051842680 in words is "eighteen billion, fifty-one million, eight hundred forty-two thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 37 40 74 148 185 296 370 740 1480 12197191 24394382 48788764 60985955 97577528 121971910 243943820 451296067 487887640 902592134 1805184268 2256480335 3610368536 4512960670 9025921340 18051842680