Base | Representation |
---|---|
bin | 100011110011… |
… | …1000011001100 |
3 | 1022022201120122 |
4 | 1013213003030 |
5 | 14301202142 |
6 | 1510204112 |
7 | 315363236 |
oct | 107470314 |
9 | 38281518 |
10 | 18772172 |
11 | a6618a1 |
12 | 6353638 |
13 | 3b735c3 |
14 | 26c9256 |
15 | 19ac1d2 |
hex | 11e70cc |
18772172 has 12 divisors (see below), whose sum is σ = 33739440. Its totient is φ = 9132336.
The previous prime is 18772157. The next prime is 18772177. The reversal of 18772172 is 27127781.
It is not an unprimeable number, because it can be changed into a prime (18772177) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63272 + ... + 63567.
It is an arithmetic number, because the mean of its divisors is an integer number (2811620).
Almost surely, 218772172 is an apocalyptic number.
It is an amenable number.
18772172 is a deficient number, since it is larger than the sum of its proper divisors (14967268).
18772172 is a wasteful number, since it uses less digits than its factorization.
18772172 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 126880 (or 126878 counting only the distinct ones).
The product of its digits is 10976, while the sum is 35.
The square root of 18772172 is about 4332.6864645391. The cubic root of 18772172 is about 265.7693177835.
The spelling of 18772172 in words is "eighteen million, seven hundred seventy-two thousand, one hundred seventy-two".
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