Base | Representation |
---|---|
bin | 10010111010101000… |
… | …110010000110001000 |
3 | 1221102111221220211100 |
4 | 102322220302012020 |
5 | 313044121403222 |
6 | 13155241501400 |
7 | 1316220456015 |
oct | 227250620610 |
9 | 57374856740 |
10 | 20311122312 |
11 | 868310a8a8 |
12 | 3b2a1a1860 |
13 | 1bb8c9b090 |
14 | da975270c |
15 | 7dd2254ac |
hex | 4baa32188 |
20311122312 has 96 divisors (see below), whose sum is σ = 61283640600. Its totient is φ = 6034065408.
The previous prime is 20311122301. The next prime is 20311122343. The reversal of 20311122312 is 21322111302.
20311122312 is a `hidden beast` number, since 20 + 311 + 1 + 22 + 312 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 9957245796 + 10353876516 = 99786^2 + 101754^2 .
It is a Harshad number since it is a multiple of its sum of digits (18).
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346993 + ... + 401280.
Almost surely, 220311122312 is an apocalyptic number.
It is an amenable number.
20311122312 is an abundant number, since it is smaller than the sum of its proper divisors (40972518288).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20311122312 is a wasteful number, since it uses less digits than its factorization.
20311122312 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 748327 (or 748320 counting only the distinct ones).
The product of its (nonzero) digits is 144, while the sum is 18.
Adding to 20311122312 its reverse (21322111302), we get a palindrome (41633233614).
The spelling of 20311122312 in words is "twenty billion, three hundred eleven million, one hundred twenty-two thousand, three hundred twelve".
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