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18064948471 = 26390775731
BaseRepresentation
bin10000110100110000…
…010011110011110111
31201121222101110120121
4100310300103303313
5243444111322341
612144322312411
71206444346153
oct206460236367
951558343517
1018064948471
117730213189
123601ab8707
13191b820a2b
14c352d6063
1570ae374d1
hex434c13cf7

18064948471 has 8 divisors (see below), whose sum is σ = 18153869184. Its totient is φ = 17976181560.

The previous prime is 18064948469. The next prime is 18064948477. The reversal of 18064948471 is 17484946081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18064948471 - 21 = 18064948469 is a prime.

It is a super-3 number, since 3×180649484713 (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18064948477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200676 + ... + 276406.

It is an arithmetic number, because the mean of its divisors is an integer number (2269233648).

Almost surely, 218064948471 is an apocalyptic number.

18064948471 is a deficient number, since it is larger than the sum of its proper divisors (88920713).

18064948471 is an equidigital number, since it uses as much as digits as its factorization.

18064948471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76901.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 18064948471 in words is "eighteen billion, sixty-four million, nine hundred forty-eight thousand, four hundred seventy-one".

Divisors: 1 263 907 75731 238541 19917253 68688017 18064948471