Base | Representation |
---|---|
bin | 10001010101010111… |
… | …110011111111111111 |
3 | 1210001010002110001011 |
4 | 101111113303333333 |
5 | 301104204043342 |
6 | 12314511300051 |
7 | 1226140606300 |
oct | 212527637777 |
9 | 53033073034 |
10 | 18612174847 |
11 | 79910a6492 |
12 | 373521a627 |
13 | 19a7ccc916 |
14 | c87c627a7 |
15 | 73decd717 |
hex | 4555f3fff |
18612174847 has 12 divisors (see below), whose sum is σ = 22349315136. Its totient is φ = 15438669120.
The previous prime is 18612174767. The next prime is 18612174851. The reversal of 18612174847 is 74847121681.
It is a happy number.
It is a de Polignac number, because none of the positive numbers 2k-18612174847 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (49).
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 18612174847.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (18612175847) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6124938 + ... + 6127975.
It is an arithmetic number, because the mean of its divisors is an integer number (1862442928).
Almost surely, 218612174847 is an apocalyptic number.
18612174847 is a deficient number, since it is larger than the sum of its proper divisors (3737140289).
18612174847 is a wasteful number, since it uses less digits than its factorization.
18612174847 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12252958 (or 12252951 counting only the distinct ones).
The product of its digits is 602112, while the sum is 49.
The spelling of 18612174847 in words is "eighteen billion, six hundred twelve million, one hundred seventy-four thousand, eight hundred forty-seven".
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