Base | Representation |
---|---|
bin | 10011000110001100… |
… | …110000011110010000 |
3 | 1221221000222010020112 |
4 | 103012030300132100 |
5 | 313443301232344 |
6 | 13230411300452 |
7 | 1324064331065 |
oct | 230614603620 |
9 | 57830863215 |
10 | 20505102224 |
11 | 8772660882 |
12 | 3b8314a728 |
13 | 1c1a2281a9 |
14 | dc7408c6c |
15 | 800290c9e |
hex | 4c6330790 |
20505102224 has 40 divisors (see below), whose sum is σ = 41318962560. Its totient is φ = 9849161088.
The previous prime is 20505102193. The next prime is 20505102227. The reversal of 20505102224 is 42220150502.
It is a self number, because there is not a number n which added to its sum of digits gives 20505102224.
It is not an unprimeable number, because it can be changed into a prime (20505102227) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172454 + ... + 265989.
It is an arithmetic number, because the mean of its divisors is an integer number (1032974064).
Almost surely, 220505102224 is an apocalyptic number.
It is an amenable number.
20505102224 is an abundant number, since it is smaller than the sum of its proper divisors (20813860336).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20505102224 is a wasteful number, since it uses less digits than its factorization.
20505102224 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 438567 (or 438561 counting only the distinct ones).
The product of its (nonzero) digits is 1600, while the sum is 23.
Adding to 20505102224 its reverse (42220150502), we get a palindrome (62725252726).
The spelling of 20505102224 in words is "twenty billion, five hundred five million, one hundred two thousand, two hundred twenty-four".
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