| Base | Representation |
|---|---|
| bin | 1000101000110100110100… |
| … | …10011111010100100000000 |
| 3 | 2111020220020122000121000000 |
| 4 | 10110122122103322210000 |
| 5 | 4442203111134413114 |
| 6 | 104222052524000000 |
| 7 | 4000224115336650 |
| oct | 424323223724400 |
| 9 | 74226218017000 |
| 10 | 18994934294784 |
| 11 | 6063785237908 |
| 12 | 2169419090000 |
| 13 | a7a2a36928b6 |
| 14 | 49950712c360 |
| 15 | 22e17da39e09 |
| hex | 11469a4fa900 |
18994934294784 has 1008 divisors, whose sum is σ = 69074192638080. Its totient is φ = 5089908326400.
The previous prime is 18994934294779. The next prime is 18994934294821. The reversal of 18994934294784 is 48749243949981.
18994934294784 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 493 + 4 + 2 + 9 + 47 + 84 = 666.
It is a tau number, because it is divible by the number of its divisors (1008).
It is a super-2 number, since 2×189949342947842 (a number of 27 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (81).
It is a nude number because it is divisible by every one of its digits.
It is an unprimeable number.
It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2506916404 + ... + 2506923980.
It is an arithmetic number, because the mean of its divisors is an integer number (68525984760).
Almost surely, 218994934294784 is an apocalyptic number.
18994934294784 is a gapful number since it is divisible by the number (14) 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 18994934294784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34537096319040).
18994934294784 is an abundant number, since it is smaller than the sum of its proper divisors (50079258343296).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18994934294784 is an equidigital number, since it uses as much as digits as its factorization.
18994934294784 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7738 (or 7709 counting only the distinct ones).
The product of its digits is 4514807808, while the sum is 81.
The spelling of 18994934294784 in words is "eighteen trillion, nine hundred ninety-four billion, nine hundred thirty-four million, two hundred ninety-four thousand, seven hundred eighty-four".
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