Base | Representation |
---|---|
bin | 10010111010100100… |
… | …100000011001001110 |
3 | 1221102102211221222210 |
4 | 102322210200121032 |
5 | 313043330014410 |
6 | 13155201451250 |
7 | 1316205106401 |
oct | 227244403116 |
9 | 57372757883 |
10 | 20310001230 |
11 | 8682514592 |
12 | 3b29940b26 |
13 | 1bb8997a0c |
14 | da953dd38 |
15 | 7dd0a3220 |
hex | 4ba92064e |
20310001230 has 256 divisors, whose sum is σ = 54159114240. Its totient is φ = 4860172800.
The previous prime is 20310001139. The next prime is 20310001237. The reversal of 20310001230 is 3210001302.
It is a happy number.
It is a super-4 number, since 4×203100012304 (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20310001237) by changing a digit.
It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 96255825 + ... + 96256035.
It is an arithmetic number, because the mean of its divisors is an integer number (211559040).
Almost surely, 220310001230 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 20310001230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27079557120).
20310001230 is an abundant number, since it is smaller than the sum of its proper divisors (33849113010).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20310001230 is a wasteful number, since it uses less digits than its factorization.
20310001230 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 407.
The product of its (nonzero) digits is 36, while the sum is 12.
Adding to 20310001230 its reverse (3210001302), we get a palindrome (23520002532).
The spelling of 20310001230 in words is "twenty billion, three hundred ten million, one thousand, two hundred thirty".
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