| Base | Representation |
|---|---|
| bin | 100110100011… |
| … | …0000110110100 |
| 3 | 1102000210001020 |
| 4 | 1031012012310 |
| 5 | 20133210400 |
| 6 | 2001101140 |
| 7 | 333532401 |
| oct | 115060664 |
| 9 | 42023036 |
| 10 | 20210100 |
| 11 | 10454169 |
| 12 | 69277b0 |
| 13 | 4257c51 |
| 14 | 29812a8 |
| 15 | 1b932a0 |
| hex | 13461b4 |
20210100 has 144 divisors (see below), whose sum is σ = 63745920. Its totient is φ = 4928000.
The previous prime is 20210087. The next prime is 20210101. The reversal of 20210100 is 101202.
It is a happy number.
It is a super-3 number, since 3×202101003 (a number of 23 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (6).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20210101) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200050 + ... + 200150.
It is an arithmetic number, because the mean of its divisors is an integer number (442680).
Almost surely, 220210100 is an apocalyptic number.
20210100 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 20210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31872960).
20210100 is an abundant number, since it is smaller than the sum of its proper divisors (43535820).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20210100 is a wasteful number, since it uses less digits than its factorization.
20210100 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 170 (or 163 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 6.
The square root of 20210100 is about 4495.5644806854. The cubic root of 20210100 is about 272.3889511886.
Adding to 20210100 its reverse (101202), we get a palindrome (20311302).
The spelling of 20210100 in words is "twenty million, two hundred ten thousand, one hundred".
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