| Base | Representation |
|---|---|
| bin | 111110100111110… |
| … | …0110000011010100 |
| 3 | 12102102212001102110 |
| 4 | 1331033212003110 |
| 5 | 13300404140040 |
| 6 | 544300511020 |
| 7 | 103033150125 |
| oct | 17517460324 |
| 9 | 5372761373 |
| 10 | 2101240020 |
| 11 | 989105800 |
| 12 | 4a784b470 |
| 13 | 2764333b9 |
| 14 | 15d0d004c |
| 15 | c470e980 |
| hex | 7d3e60d4 |
2101240020 has 144 divisors (see below), whose sum is σ = 6807769920. Its totient is φ = 482549760.
The previous prime is 2101240007. The next prime is 2101240033. The reversal of 2101240020 is 200421012.
It is an interprime number because it is at equal distance from previous prime (2101240007) and next prime (2101240033).
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a junction number, because it is equal to n+sod(n) for n = 2101239978 and 2101240005.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130324 + ... + 145556.
It is an arithmetic number, because the mean of its divisors is an integer number (47276180).
Almost surely, 22101240020 is an apocalyptic number.
2101240020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2101240020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3403884960).
2101240020 is an abundant number, since it is smaller than the sum of its proper divisors (4706529900).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2101240020 is a wasteful number, since it uses less digits than its factorization.
2101240020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15286 (or 15273 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 12.
The square root of 2101240020 is about 45839.2846802827. The cubic root of 2101240020 is about 1280.8311699599.
Adding to 2101240020 its reverse (200421012), we get a palindrome (2301661032).
The spelling of 2101240020 in words is "two billion, one hundred one million, two hundred forty thousand, twenty".
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