Base | Representation |
---|---|
bin | 100100001000… |
… | …1100110000010 |
3 | 1022122120121210 |
4 | 1020101212002 |
5 | 14322241214 |
6 | 1514030550 |
7 | 320020263 |
oct | 110214602 |
9 | 38576553 |
10 | 18946434 |
11 | a770811 |
12 | 6418456 |
13 | 3c04a10 |
14 | 273296a |
15 | 19e3b59 |
hex | 1211982 |
18946434 has 64 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 5451072.
The previous prime is 18946427. The next prime is 18946451. The reversal of 18946434 is 43464981.
It is a happy number.
It is a super-2 number, since 2×189464342 = 717934722632712, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (39).
It is a junction number, because it is equal to n+sod(n) for n = 18946392 and 18946401.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105757 + ... + 105935.
It is an arithmetic number, because the mean of its divisors is an integer number (680400).
Almost surely, 218946434 is an apocalyptic number.
18946434 is the 2327-th nonagonal number.
It is a practical number, because each smaller number is the sum of distinct divisors of 18946434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).
18946434 is an abundant number, since it is smaller than the sum of its proper divisors (24599166).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18946434 is a wasteful number, since it uses less digits than its factorization.
18946434 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 279.
The product of its digits is 82944, while the sum is 39.
The square root of 18946434 is about 4352.7501651255. The cubic root of 18946434 is about 266.5891646303.
The spelling of 18946434 in words is "eighteen million, nine hundred forty-six thousand, four hundred thirty-four".
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