Base | Representation |
---|---|
bin | 10011101100111100… |
… | …001000010110101000 |
3 | 2000121022222010212011 |
4 | 103230330020112220 |
5 | 321311143230031 |
6 | 13415110125304 |
7 | 1346146000144 |
oct | 235474102650 |
9 | 60538863764 |
10 | 21155055016 |
11 | 8a76527a47 |
12 | 4124950834 |
13 | 1cc1a93844 |
14 | 1049876224 |
15 | 83c3796b1 |
hex | 4ecf085a8 |
21155055016 has 16 divisors (see below), whose sum is σ = 39667314240. Its totient is φ = 10577104560.
The previous prime is 21155055013. The next prime is 21155055079. The reversal of 21155055016 is 61055055112.
It is not an unprimeable number, because it can be changed into a prime (21155055013) 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, 292155 + ... + 357301.
It is an arithmetic number, because the mean of its divisors is an integer number (2479207140).
Almost surely, 221155055016 is an apocalyptic number.
It is an amenable number.
21155055016 is a deficient number, since it is larger than the sum of its proper divisors (18512259224).
21155055016 is a wasteful number, since it uses less digits than its factorization.
21155055016 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 105744 (or 105740 counting only the distinct ones).
The product of its (nonzero) digits is 7500, while the sum is 31.
The spelling of 21155055016 in words is "twenty-one billion, one hundred fifty-five million, fifty-five thousand, sixteen".
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