| Base | Representation |
|---|---|
| bin | 10010110100110011… |
| … | …010100011111001000 |
| 3 | 1221011200202000220200 |
| 4 | 102310303110133020 |
| 5 | 312344041040240 |
| 6 | 13141423252200 |
| 7 | 1313621355255 |
| oct | 226463243710 |
| 9 | 57150660820 |
| 10 | 20213221320 |
| 11 | 8632922396 |
| 12 | 3b0144a060 |
| 13 | 1ba1910ab6 |
| 14 | d9a74a42c |
| 15 | 7d4837930 |
| hex | 4b4cd47c8 |
20213221320 has 96 divisors (see below), whose sum is σ = 65786455800. Its totient is φ = 5382521856.
The previous prime is 20213221297. The next prime is 20213221331. The reversal of 20213221320 is 2312231202.
20213221320 is a `hidden beast` number, since 2 + 0 + 21 + 322 + 1 + 320 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 10439526276 + 9773695044 = 102174^2 + 98862^2 .
It is a super-2 number, since 2×202132213202 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 20213221293 and 20213221302.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215644 + ... + 294836.
Almost surely, 220213221320 is an apocalyptic number.
20213221320 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 20213221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32893227900).
20213221320 is an abundant number, since it is smaller than the sum of its proper divisors (45573234480).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20213221320 is a wasteful number, since it uses less digits than its factorization.
20213221320 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 79919 (or 79912 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 18.
Adding to 20213221320 its reverse (2312231202), we get a palindrome (22525452522).
The spelling of 20213221320 in words is "twenty billion, two hundred thirteen million, two hundred twenty-one thousand, three hundred twenty".
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