Base | Representation |
---|---|
bin | 100110101111… |
… | …0000101100001 |
3 | 1102012202210001 |
4 | 1031132011201 |
5 | 20144331241 |
6 | 2003140001 |
7 | 334421635 |
oct | 115360541 |
9 | 42182701 |
10 | 20308321 |
11 | 10510a40 |
12 | 6974601 |
13 | 4290877 |
14 | 29a8dc5 |
15 | 1bb2431 |
hex | 135e161 |
20308321 has 8 divisors (see below), whose sum is σ = 23320800. Its totient is φ = 17490240.
The previous prime is 20308291. The next prime is 20308339. The reversal of 20308321 is 12380302.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20308321 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (19).
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (20308361) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48376 + ... + 48793.
It is an arithmetic number, because the mean of its divisors is an integer number (2915100).
Almost surely, 220308321 is an apocalyptic number.
It is an amenable number.
20308321 is a deficient number, since it is larger than the sum of its proper divisors (3012479).
20308321 is a wasteful number, since it uses less digits than its factorization.
20308321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 97199.
The product of its (nonzero) digits is 288, while the sum is 19.
The square root of 20308321 is about 4506.4754520578. The cubic root of 20308321 is about 272.8295079707.
Adding to 20308321 its reverse (12380302), we get a palindrome (32688623).
The spelling of 20308321 in words is "twenty million, three hundred eight thousand, three hundred twenty-one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.000 sec. • engine limits •