| Base | Representation |
|---|---|
| bin | 1001110000111100… |
| … | …0110101000011100 |
| 3 | 20202200021000022102 |
| 4 | 2130033012220130 |
| 5 | 20332012030040 |
| 6 | 1112033304232 |
| 7 | 121645606100 |
| oct | 23417065034 |
| 9 | 6680230272 |
| 10 | 2621205020 |
| 11 | 1125669145 |
| 12 | 611a05078 |
| 13 | 32a0889b5 |
| 14 | 1ac1a1900 |
| 15 | 1051bd515 |
| hex | 9c3c6a1c |
2621205020 has 144 divisors (see below), whose sum is σ = 6679260000. Its totient is φ = 860493312.
The previous prime is 2621205011. The next prime is 2621205029. The reversal of 2621205020 is 205021262.
It is an interprime number because it is at equal distance from previous prime (2621205011) and next prime (2621205029).
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a junction number, because it is equal to n+sod(n) for n = 2621204983 and 2621205001.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2621205029) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4234271 + ... + 4234889.
It is an arithmetic number, because the mean of its divisors is an integer number (46383750).
Almost surely, 22621205020 is an apocalyptic number.
2621205020 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 2621205020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3339630000).
2621205020 is an abundant number, since it is smaller than the sum of its proper divisors (4058054980).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2621205020 is a wasteful number, since it uses less digits than its factorization.
2621205020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 820 (or 811 counting only the distinct ones).
The product of its (nonzero) digits is 480, while the sum is 20.
The square root of 2621205020 is about 51197.7052220117. The cubic root of 2621205020 is about 1378.7970017351.
Adding to 2621205020 its reverse (205021262), we get a palindrome (2826226282).
The spelling of 2621205020 in words is "two billion, six hundred twenty-one million, two hundred five thousand, twenty".
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