Base | Representation |
---|---|
bin | 1001100011110010110111… |
… | …00110011111001110111101 |
3 | 2202102121011001222120101002 |
4 | 10301321123212133032331 |
5 | 10223402211312401220 |
6 | 112412544011500045 |
7 | 4266503423215121 |
oct | 461713346371675 |
9 | 82377131876332 |
10 | 21021106762685 |
11 | 6775001826157 |
12 | 2436046157625 |
13 | b96388335063 |
14 | 5295d9969581 |
15 | 266c195d7c75 |
hex | 131e5b99f3bd |
21021106762685 has 32 divisors (see below), whose sum is σ = 27130402828800. Its totient is φ = 15599170540800.
The previous prime is 21021106762637. The next prime is 21021106762699. The reversal of 21021106762685 is 58626760112012.
It is not a de Polignac number, because 21021106762685 - 226 = 21021039653821 is a prime.
It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20604710 + ... + 21600839.
It is an arithmetic number, because the mean of its divisors is an integer number (847825088400).
Almost surely, 221021106762685 is an apocalyptic number.
It is an amenable number.
21021106762685 is a deficient number, since it is larger than the sum of its proper divisors (6109296066115).
21021106762685 is a wasteful number, since it uses less digits than its factorization.
21021106762685 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 42205709.
The product of its (nonzero) digits is 483840, while the sum is 47.
Adding to 21021106762685 its reverse (58626760112012), we get a palindrome (79647866874697).
The spelling of 21021106762685 in words is "twenty-one trillion, twenty-one billion, one hundred six million, seven hundred sixty-two thousand, six hundred eighty-five".
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