Base | Representation |
---|---|
bin | 100110111100… |
… | …1011100111100 |
3 | 1102102110112120 |
4 | 1031321130330 |
5 | 20211423122 |
6 | 2005402540 |
7 | 335366505 |
oct | 115713474 |
9 | 42373476 |
10 | 20420412 |
11 | 10588181 |
12 | 6a09450 |
13 | 42cc8ac |
14 | 29d7bac |
15 | 1bd575c |
hex | 137973c |
20420412 has 48 divisors (see below), whose sum is σ = 50088192. Its totient is φ = 6462720.
The previous prime is 20420377. The next prime is 20420443. The reversal of 20420412 is 21402402.
It is a junction number, because it is equal to n+sod(n) for n = 20420391 and 20420400.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66363 + ... + 66669.
It is an arithmetic number, because the mean of its divisors is an integer number (1043504).
Almost surely, 220420412 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 20420412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25044096).
20420412 is an abundant number, since it is smaller than the sum of its proper divisors (29667780).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20420412 is a wasteful number, since it uses less digits than its factorization.
20420412 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 578 (or 576 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 15.
The square root of 20420412 is about 4518.8949976737. The cubic root of 20420412 is about 273.3305446209.
Adding to 20420412 its reverse (21402402), we get a palindrome (41822814).
The spelling of 20420412 in words is "twenty million, four hundred twenty thousand, four hundred twelve".
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