| Base | Representation |
|---|---|
| bin | 10010000111101100… |
| … | …010001001000100000 |
| 3 | 1212012221122102022000 |
| 4 | 102013230101020200 |
| 5 | 304321314212411 |
| 6 | 12534350044000 |
| 7 | 1256101440000 |
| oct | 220754211040 |
| 9 | 55187572260 |
| 10 | 19456397856 |
| 11 | 82846a1755 |
| 12 | 392baa9600 |
| 13 | 1ab0b9756c |
| 14 | d28020000 |
| 15 | 78d18d956 |
| hex | 487b11220 |
19456397856 has 480 divisors, whose sum is σ = 67592387520. Its totient is φ = 5443393536.
The previous prime is 19456397839. The next prime is 19456397869. The reversal of 19456397856 is 65879365491.
19456397856 is a `hidden beast` number, since 19 + 4 + 563 + 9 + 7 + 8 + 56 = 666.
It is a super-2 number, since 2×194563978562 (a number of 21 digits) contains 22 as substring.
It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.
It is a Harshad number since it is a multiple of its sum of digits (63).
Its product of digits (48988800) is a multiple of the sum of its prime factors (243).
It is a junction number, because it is equal to n+sod(n) for n = 19456397793 and 19456397802.
It is an unprimeable number.
It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 172180456 + ... + 172180568.
It is an arithmetic number, because the mean of its divisors is an integer number (140817474).
Almost surely, 219456397856 is an apocalyptic number.
19456397856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 19456397856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33796193760).
19456397856 is an abundant number, since it is smaller than the sum of its proper divisors (48135989664).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
19456397856 is an equidigital number, since it uses as much as digits as its factorization.
19456397856 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 243 (or 208 counting only the distinct ones).
The product of its digits is 48988800, while the sum is 63.
The spelling of 19456397856 in words is "nineteen billion, four hundred fifty-six million, three hundred ninety-seven thousand, eight hundred fifty-six".
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