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18965818108 = 2235111350457
BaseRepresentation
bin10001101010011100…
…110110101011111100
31210221202112101101201
4101222130312223330
5302320222134413
612413543145244
71240663536226
oct215234665374
953852471351
1018965818108
118052789946
123813745224
131a333601a3
14cbcbdb416
157600869dd
hex46a736afc

18965818108 has 12 divisors (see below), whose sum is σ = 33199659472. Its totient is φ = 9480201120.

The previous prime is 18965818097. The next prime is 18965818121. The reversal of 18965818108 is 80181856981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661185 + ... + 689272.

Almost surely, 218965818108 is an apocalyptic number.

It is an amenable number.

18965818108 is a deficient number, since it is larger than the sum of its proper divisors (14233841364).

18965818108 is a wasteful number, since it uses less digits than its factorization.

18965818108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353972 (or 1353970 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 55.

The spelling of 18965818108 in words is "eighteen billion, nine hundred sixty-five million, eight hundred eighteen thousand, one hundred eight".

Divisors: 1 2 4 3511 7022 14044 1350457 2700914 5401828 4741454527 9482909054 18965818108