Base | Representation |
---|---|
bin | 100110111111… |
… | …0110101110000 |
3 | 1102110120210220 |
4 | 1031332311300 |
5 | 20213124410 |
6 | 2010053040 |
7 | 335521032 |
oct | 115766560 |
9 | 42416726 |
10 | 20442480 |
11 | 105a2813 |
12 | 6a1a180 |
13 | 4309956 |
14 | 2a01c52 |
15 | 1bdc070 |
hex | 137ed70 |
20442480 has 80 divisors (see below), whose sum is σ = 66721920. Its totient is φ = 5163264.
The previous prime is 20442479. The next prime is 20442511. The reversal of 20442480 is 8424402.
It is a tau number, because it is divible by the number of its divisors (80).
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a self number, because there is not a number n which added to its sum of digits gives 20442480.
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, 2319 + ... + 6801.
It is an arithmetic number, because the mean of its divisors is an integer number (834024).
Almost surely, 220442480 is an apocalyptic number.
20442480 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 20442480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33360960).
20442480 is an abundant number, since it is smaller than the sum of its proper divisors (46279440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20442480 is a wasteful number, since it uses less digits than its factorization.
20442480 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4518 (or 4512 counting only the distinct ones).
The product of its (nonzero) digits is 2048, while the sum is 24.
The square root of 20442480 is about 4521.3360857163. The cubic root of 20442480 is about 273.4289704333.
Adding to 20442480 its reverse (8424402), we get a palindrome (28866882).
The spelling of 20442480 in words is "twenty million, four hundred forty-two thousand, four hundred eighty".
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