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18878585060 = 2251949680487
BaseRepresentation
bin10001100101010000…
…000101100011100100
31210201200101111011002
4101211100011203210
5302130404210220
612401145332432
71235554216406
oct214520054344
953650344132
1018878585060
118008518415
1237aa497118
131a1b2697ba
14cb13b0b76
157575a4c75
hex4654058e4

18878585060 has 24 divisors (see below), whose sum is σ = 41731609920. Its totient is φ = 7153989984.

The previous prime is 18878585059. The next prime is 18878585129. The reversal of 18878585060 is 6058587881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18878584987 and 18878585005.

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 7 ways as a sum of consecutive naturals, for example, 24839864 + ... + 24840623.

It is an arithmetic number, because the mean of its divisors is an integer number (1738817080).

Almost surely, 218878585060 is an apocalyptic number.

18878585060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18878585060 is an abundant number, since it is smaller than the sum of its proper divisors (22853024860).

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

18878585060 is a wasteful number, since it uses less digits than its factorization.

18878585060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49680515 (or 49680513 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 56.

The spelling of 18878585060 in words is "eighteen billion, eight hundred seventy-eight million, five hundred eighty-five thousand, sixty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 49680487 99360974 198721948 248402435 496804870 943929253 993609740 1887858506 3775717012 4719646265 9439292530 18878585060