Base | Representation |
---|---|
bin | 10010110001010101… |
… | …001110100010110111 |
3 | 1221000122012010200002 |
4 | 102301111032202313 |
5 | 312234140013030 |
6 | 13131543341515 |
7 | 1312313452622 |
oct | 226125164267 |
9 | 57018163602 |
10 | 20155001015 |
11 | 8602a77636 |
12 | 3aa5a5189b |
13 | 1b92837c06 |
14 | d92b12db9 |
15 | 7ce687245 |
hex | 4b154e8b7 |
20155001015 has 32 divisors (see below), whose sum is σ = 26512738560. Its totient is φ = 14640640000.
The previous prime is 20155001003. The next prime is 20155001047. The reversal of 20155001015 is 51010055102.
It is a happy number.
It is not a de Polignac number, because 20155001015 - 230 = 19081259191 is a prime.
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, 4239890 + ... + 4244640.
It is an arithmetic number, because the mean of its divisors is an integer number (828523080).
Almost surely, 220155001015 is an apocalyptic number.
20155001015 is a deficient number, since it is larger than the sum of its proper divisors (6357737545).
20155001015 is a wasteful number, since it uses less digits than its factorization.
20155001015 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6523.
The product of its (nonzero) digits is 250, while the sum is 20.
Adding to 20155001015 its reverse (51010055102), we get a palindrome (71165056117).
The spelling of 20155001015 in words is "twenty billion, one hundred fifty-five million, one thousand, fifteen".
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