Base | Representation |
---|---|
bin | 100110111010… |
… | …0100011001010 |
3 | 1102101102222210 |
4 | 1031310203022 |
5 | 20210302310 |
6 | 2005125550 |
7 | 335254116 |
oct | 115644312 |
9 | 42342883 |
10 | 20400330 |
11 | 10574085 |
12 | 69b98b6 |
13 | 42c3702 |
14 | 29d0746 |
15 | 1bce820 |
hex | 13748ca |
20400330 has 32 divisors (see below), whose sum is σ = 49104000. Its totient is φ = 5424192.
The previous prime is 20400307. The next prime is 20400337. The reversal of 20400330 is 3300402.
It is not an unprimeable number, because it can be changed into a prime (20400337) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12396 + ... + 13944.
It is an arithmetic number, because the mean of its divisors is an integer number (1534500).
Almost surely, 220400330 is an apocalyptic number.
20400330 is an abundant number, since it is smaller than the sum of its proper divisors (28703670).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20400330 is a wasteful number, since it uses less digits than its factorization.
20400330 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1998.
The product of its (nonzero) digits is 72, while the sum is 12.
The square root of 20400330 is about 4516.6724477208. The cubic root of 20400330 is about 273.2409149514.
Adding to 20400330 its product of nonzero digits (72), we get a palindrome (20400402).
Adding to 20400330 its reverse (3300402), we get a palindrome (23700732).
The spelling of 20400330 in words is "twenty million, four hundred thousand, three hundred thirty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.071 sec. • engine limits •