Base | Representation |
---|---|
bin | 10011010000101110… |
… | …010101010000000010 |
3 | 1222101100012222121210 |
4 | 103100232111100002 |
5 | 314324002111103 |
6 | 13300120030550 |
7 | 1331340225561 |
oct | 232056252002 |
9 | 58340188553 |
10 | 20681675778 |
11 | 88532a3135 |
12 | 4012302456 |
13 | 1c4799c59a |
14 | 1002a4dbd8 |
15 | 810a1de03 |
hex | 4d0b95402 |
20681675778 has 8 divisors (see below), whose sum is σ = 41363351568. Its totient is φ = 6893891924.
The previous prime is 20681675753. The next prime is 20681675779. The reversal of 20681675778 is 87757618602.
It is a sphenic number, since it is the product of 3 distinct primes.
20681675778 is an admirable number.
It is not an unprimeable number, because it can be changed into a prime (20681675779) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1723472976 + ... + 1723472987.
It is an arithmetic number, because the mean of its divisors is an integer number (5170418946).
Almost surely, 220681675778 is an apocalyptic number.
20681675778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20681675778 is a wasteful number, since it uses less digits than its factorization.
20681675778 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3446945968.
The product of its (nonzero) digits is 7902720, while the sum is 57.
The spelling of 20681675778 in words is "twenty billion, six hundred eighty-one million, six hundred seventy-five thousand, seven hundred seventy-eight".
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