Base | Representation |
---|---|
bin | 10011101100001010… |
… | …110010011111011010 |
3 | 2000120102121222220200 |
4 | 103230022302133122 |
5 | 321244340323120 |
6 | 13413525003030 |
7 | 1345631026005 |
oct | 235412623732 |
9 | 60512558820 |
10 | 21142120410 |
11 | 8a6a1a2a94 |
12 | 4120553476 |
13 | 1cbc1b5328 |
14 | 1047c6a53c |
15 | 83b171e90 |
hex | 4ec2b27da |
21142120410 has 48 divisors (see below), whose sum is σ = 55035227520. Its totient is φ = 5631158880.
The previous prime is 21142120387. The next prime is 21142120411. The reversal of 21142120410 is 1402124112.
21142120410 is a `hidden beast` number, since 211 + 4 + 21 + 20 + 410 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is not an unprimeable number, because it can be changed into a prime (21142120411) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64486 + ... + 215505.
It is an arithmetic number, because the mean of its divisors is an integer number (1146567240).
Almost surely, 221142120410 is an apocalyptic number.
21142120410 is an abundant number, since it is smaller than the sum of its proper divisors (33893107110).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21142120410 is a wasteful number, since it uses less digits than its factorization.
21142120410 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 280843 (or 280840 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 21142120410 its reverse (1402124112), we get a palindrome (22544244522).
The spelling of 21142120410 in words is "twenty-one billion, one hundred forty-two million, one hundred twenty thousand, four hundred ten".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.066 sec. • engine limits •