Base | Representation |
---|---|
bin | 10010101110001011… |
… | …011101111111110100 |
3 | 1220212221200001111210 |
4 | 102232023131333310 |
5 | 312132120024340 |
6 | 13122414001420 |
7 | 1311102061152 |
oct | 225613357764 |
9 | 56787601453 |
10 | 20102111220 |
11 | 8586132764 |
12 | 3a901a6270 |
13 | 1b848aa389 |
14 | d89aa63d2 |
15 | 7c9bdb180 |
hex | 4ae2ddff4 |
20102111220 has 48 divisors (see below), whose sum is σ = 56866195008. Its totient is φ = 5305297920.
The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111220 is 2211120102.
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 = 20102111196 and 20102111205.
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, 1721166 + ... + 1732805.
It is an arithmetic number, because the mean of its divisors is an integer number (1184712396).
Almost surely, 220102111220 is an apocalyptic number.
20102111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
20102111220 is an abundant number, since it is smaller than the sum of its proper divisors (36764083788).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20102111220 is a wasteful number, since it uses less digits than its factorization.
20102111220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3454080 (or 3454078 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 12.
Adding to 20102111220 its reverse (2211120102), we get a palindrome (22313231322).
The spelling of 20102111220 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred twenty".
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