Base | Representation |
---|---|
bin | 1001011010101101010000… |
… | …10100111010011100111001 |
3 | 2201022202012011020002022111 |
4 | 10231112220110322130321 |
5 | 10203243222003413401 |
6 | 112013304121452321 |
7 | 4235110614301411 |
oct | 455265024723471 |
9 | 81282164202274 |
10 | 20708861388601 |
11 | 6664640414091 |
12 | 23a56239410a1 |
13 | b72ab658b989 |
14 | 5184583b5641 |
15 | 25da41d89e51 |
hex | 12d5a853a739 |
20708861388601 has 9 divisors (see below), whose sum is σ = 20790928317999. Its totient is φ = 20627117182464.
The previous prime is 20708861388497. The next prime is 20708861388629. The reversal of 20708861388601 is 10688316880702.
It is a happy number.
The square root of 20708861388601 is 4550699.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in only one way, i.e., 20387798631225 + 321062757376 = 4515285^2 + 566624^2 .
It is not a de Polignac number, because 20708861388601 - 219 = 20708860864313 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (20708861383601) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1169520790 + ... + 1169538496.
Almost surely, 220708861388601 is an apocalyptic number.
20708861388601 is the 4550699-th square number.
20708861388601 is the 2275350-th centered octagonal number.
It is an amenable number.
20708861388601 is a deficient number, since it is larger than the sum of its proper divisors (82066929398).
20708861388601 is an frugal number, since it uses more digits than its factorization.
20708861388601 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35928 (or 17964 counting only the distinct ones).
The product of its (nonzero) digits is 6193152, while the sum is 58.
The spelling of 20708861388601 in words is "twenty trillion, seven hundred eight billion, eight hundred sixty-one million, three hundred eighty-eight thousand, six hundred one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.116 sec. • engine limits •