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18816217913 = 232413394591
BaseRepresentation
bin10001100001100010…
…001011001100111001
31210120100000220111202
4101201202023030321
5302013422433123
612351040503545
71234166133113
oct214142131471
953510026452
1018816217913
117a862a0019
12379161abb5
131a0b37126c
14ca6db83b3
15751d85a28
hex46188b339

18816217913 has 8 divisors (see below), whose sum is σ = 19715790336. Its totient is φ = 17923435200.

The previous prime is 18816217853. The next prime is 18816217949. The reversal of 18816217913 is 31971261881.

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 18816217913 - 210 = 18816216889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18816217613) 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, 1691753 + ... + 1702838.

It is an arithmetic number, because the mean of its divisors is an integer number (2464473792).

Almost surely, 218816217913 is an apocalyptic number.

It is an amenable number.

18816217913 is a deficient number, since it is larger than the sum of its proper divisors (899572423).

18816217913 is a wasteful number, since it uses less digits than its factorization.

18816217913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394855.

The product of its digits is 145152, while the sum is 47.

The spelling of 18816217913 in words is "eighteen billion, eight hundred sixteen million, two hundred seventeen thousand, nine hundred thirteen".

Divisors: 1 23 241 5543 3394591 78075593 818096431 18816217913