Base | Representation |
---|---|
bin | 100111101110… |
… | …1110011000010 |
3 | 1110012100100022 |
4 | 1033131303002 |
5 | 20313101201 |
6 | 2022253442 |
7 | 342031010 |
oct | 117356302 |
9 | 43170308 |
10 | 20831426 |
11 | 10838a60 |
12 | 6b87282 |
13 | 44149b5 |
14 | 2aa38b0 |
15 | 1c6741b |
hex | 13ddcc2 |
20831426 has 64 divisors (see below), whose sum is σ = 42197760. Its totient is φ = 7464960.
The previous prime is 20831323. The next prime is 20831533. The reversal of 20831426 is 62413802.
It is a lonely number, since its distance to closest prime (20831323) sets a new record.
It is a junction number, because it is equal to n+sod(n) for n = 20831395 and 20831404.
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, 191060 + ... + 191168.
It is an arithmetic number, because the mean of its divisors is an integer number (659340).
Almost surely, 220831426 is an apocalyptic number.
20831426 is an abundant number, since it is smaller than the sum of its proper divisors (21366334).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20831426 is a wasteful number, since it uses less digits than its factorization.
20831426 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 219.
The product of its (nonzero) digits is 2304, while the sum is 26.
The square root of 20831426 is about 4564.1457031957. The cubic root of 20831426 is about 275.1522066504.
The spelling of 20831426 in words is "twenty million, eight hundred thirty-one thousand, four hundred twenty-six".
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