Base | Representation |
---|---|
bin | 1001100111001001101000… |
… | …00100100101011001001011 |
3 | 2202211121202121000002001211 |
4 | 10303210310010211121023 |
5 | 10232244330331234322 |
6 | 112541533122353551 |
7 | 4311024612644533 |
oct | 463446404453113 |
9 | 82747677002054 |
10 | 21136407680587 |
11 | 680999a124351 |
12 | 24544641bb8b7 |
13 | ba4201b20374 |
14 | 531016b824c3 |
15 | 269c16c77b77 |
hex | 13393412564b |
21136407680587 has 4 divisors (see below), whose sum is σ = 21482906167216. Its totient is φ = 20789909193960.
The previous prime is 21136407680581. The next prime is 21136407680599. The reversal of 21136407680587 is 78508670463112.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 21136407680587 - 215 = 21136407647819 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (21136407680581) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173249243223 + ... + 173249243344.
It is an arithmetic number, because the mean of its divisors is an integer number (5370726541804).
Almost surely, 221136407680587 is an apocalyptic number.
21136407680587 is a deficient number, since it is larger than the sum of its proper divisors (346498486629).
21136407680587 is an equidigital number, since it uses as much as digits as its factorization.
21136407680587 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 346498486628.
The product of its (nonzero) digits is 13547520, while the sum is 58.
The spelling of 21136407680587 in words is "twenty-one trillion, one hundred thirty-six billion, four hundred seven million, six hundred eighty thousand, five hundred eighty-seven".
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